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llvm-mirror/test/CodeGen/Thumb/thumb-shrink-wrapping.ll
Diogo N. Sampaio 82cb0e3bb0 [FIX] Forces shrink wrapping to consider any memory access as aliasing with the stack 
Summary:
Relate bug: https://bugs.llvm.org/show_bug.cgi?id=37472

The shrink wrapping pass prematurally restores the stack, at a point where the stack might still be accessed.
Taking an exception can cause the stack to be corrupted.

As a first approach, this patch is overly conservative, assuming that any instruction that may load or store could access
the stack.

Reviewers: dmgreen, qcolombet

Reviewed By: qcolombet

Subscribers: simpal01, efriedma, eli.friedman, javed.absar, llvm-commits, eugenis, chill, carwil, thegameg

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D63152

llvm-svn: 363265
2019-06-13 13:56:19 +00:00

1554 lines
54 KiB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc %s -o - -enable-shrink-wrap=true -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -tail-dup-placement=0 -mtriple=thumb-macho | FileCheck %s --check-prefix=ENABLE-V4T
; RUN: llc %s -o - -enable-shrink-wrap=true -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -tail-dup-placement=0 -mtriple=thumbv5-macho | FileCheck %s --check-prefix=ENABLE-V5T
; RUN: llc %s -o - -enable-shrink-wrap=false -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -tail-dup-placement=0 -mtriple=thumb-macho | FileCheck %s --check-prefix=DISABLE-V4T
; RUN: llc %s -o - -enable-shrink-wrap=false -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -tail-dup-placement=0 -mtriple=thumbv5-macho | FileCheck %s --check-prefix=DISABLE-V5T
;
; Note: Lots of tests use inline asm instead of regular calls.
; This allows to have a better control on what the allocation will do.
; Otherwise, we may have spill right in the entry block, defeating
; shrink-wrapping. Moreover, some of the inline asm statements (nop)
; are here to ensure that the related paths do not end up as critical
; edges.
; Also disable the late if-converter as it makes harder to reason on
; the diffs.
; Disable tail-duplication during placement, as v4t vs v5t get different
; results due to branches not being analyzable under v5
; Initial motivating example: Simple diamond with a call just on one side.
define i32 @foo(i32 %a, i32 %b) {
; ENABLE-V4T-LABEL: foo:
; ENABLE-V4T: @ %bb.0:
; ENABLE-V4T-NEXT: cmp r0, r1
; ENABLE-V4T-NEXT: bge LBB0_2
; ENABLE-V4T-NEXT: @ %bb.1: @ %true
; ENABLE-V4T-NEXT: push {r7, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r7, -8
; ENABLE-V4T-NEXT: sub sp, #8
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 16
; ENABLE-V4T-NEXT: str r0, [sp, #4]
; ENABLE-V4T-NEXT: ldr r0, LCPI0_0
; ENABLE-V4T-NEXT: LPC0_0:
; ENABLE-V4T-NEXT: add r0, pc
; ENABLE-V4T-NEXT: ldr r2, [r0]
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: add r1, sp, #4
; ENABLE-V4T-NEXT: bl Ltmp0
; ENABLE-V4T-NEXT: add sp, #8
; ENABLE-V4T-NEXT: pop {r7}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: mov lr, r1
; ENABLE-V4T-NEXT: LBB0_2: @ %false
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: .p2align 2
; ENABLE-V4T-NEXT: @ %bb.3:
; ENABLE-V4T-NEXT: .data_region
; ENABLE-V4T-NEXT: LCPI0_0:
; ENABLE-V4T-NEXT: .long L_doSomething$non_lazy_ptr-(LPC0_0+4)
; ENABLE-V4T-NEXT: .end_data_region
;
; ENABLE-V5T-LABEL: foo:
; ENABLE-V5T: @ %bb.0:
; ENABLE-V5T-NEXT: cmp r0, r1
; ENABLE-V5T-NEXT: bge LBB0_2
; ENABLE-V5T-NEXT: @ %bb.1: @ %true
; ENABLE-V5T-NEXT: push {r7, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r7, -8
; ENABLE-V5T-NEXT: sub sp, #8
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 16
; ENABLE-V5T-NEXT: str r0, [sp, #4]
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: add r1, sp, #4
; ENABLE-V5T-NEXT: bl _doSomething
; ENABLE-V5T-NEXT: add sp, #8
; ENABLE-V5T-NEXT: pop {r7, pc}
; ENABLE-V5T-NEXT: LBB0_2: @ %false
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: foo:
; DISABLE-V4T: @ %bb.0:
; DISABLE-V4T-NEXT: push {r7, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r7, -8
; DISABLE-V4T-NEXT: sub sp, #8
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 16
; DISABLE-V4T-NEXT: cmp r0, r1
; DISABLE-V4T-NEXT: bge LBB0_2
; DISABLE-V4T-NEXT: @ %bb.1: @ %true
; DISABLE-V4T-NEXT: str r0, [sp, #4]
; DISABLE-V4T-NEXT: ldr r0, LCPI0_0
; DISABLE-V4T-NEXT: LPC0_0:
; DISABLE-V4T-NEXT: add r0, pc
; DISABLE-V4T-NEXT: ldr r2, [r0]
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: add r1, sp, #4
; DISABLE-V4T-NEXT: bl Ltmp0
; DISABLE-V4T-NEXT: LBB0_2: @ %false
; DISABLE-V4T-NEXT: add sp, #8
; DISABLE-V4T-NEXT: pop {r7}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: .p2align 2
; DISABLE-V4T-NEXT: @ %bb.3:
; DISABLE-V4T-NEXT: .data_region
; DISABLE-V4T-NEXT: LCPI0_0:
; DISABLE-V4T-NEXT: .long L_doSomething$non_lazy_ptr-(LPC0_0+4)
; DISABLE-V4T-NEXT: .end_data_region
;
; DISABLE-V5T-LABEL: foo:
; DISABLE-V5T: @ %bb.0:
; DISABLE-V5T-NEXT: push {r7, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r7, -8
; DISABLE-V5T-NEXT: sub sp, #8
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 16
; DISABLE-V5T-NEXT: cmp r0, r1
; DISABLE-V5T-NEXT: bge LBB0_2
; DISABLE-V5T-NEXT: @ %bb.1: @ %true
; DISABLE-V5T-NEXT: str r0, [sp, #4]
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: add r1, sp, #4
; DISABLE-V5T-NEXT: bl _doSomething
; DISABLE-V5T-NEXT: LBB0_2: @ %false
; DISABLE-V5T-NEXT: add sp, #8
; DISABLE-V5T-NEXT: pop {r7, pc}
%tmp = alloca i32, align 4
%tmp2 = icmp slt i32 %a, %b
br i1 %tmp2, label %true, label %false
true:
store i32 %a, i32* %tmp, align 4
%tmp4 = call i32 @doSomething(i32 0, i32* %tmp)
br label %false
false:
%tmp.0 = phi i32 [ %tmp4, %true ], [ %a, %0 ]
ret i32 %tmp.0
}
; Same, but the final BB is non-trivial, so we don't duplicate the return inst.
define i32 @bar(i32 %a, i32 %b) {
; ENABLE-V4T-LABEL: bar:
; ENABLE-V4T: @ %bb.0:
; ENABLE-V4T-NEXT: cmp r0, r1
; ENABLE-V4T-NEXT: bge LBB1_2
; ENABLE-V4T-NEXT: @ %bb.1: @ %true
; ENABLE-V4T-NEXT: push {r7, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r7, -8
; ENABLE-V4T-NEXT: sub sp, #8
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 16
; ENABLE-V4T-NEXT: str r0, [sp, #4]
; ENABLE-V4T-NEXT: ldr r0, LCPI1_0
; ENABLE-V4T-NEXT: LPC1_0:
; ENABLE-V4T-NEXT: add r0, pc
; ENABLE-V4T-NEXT: ldr r2, [r0]
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: add r1, sp, #4
; ENABLE-V4T-NEXT: bl Ltmp1
; ENABLE-V4T-NEXT: add sp, #8
; ENABLE-V4T-NEXT: pop {r7}
; ENABLE-V4T-NEXT: pop {r0}
; ENABLE-V4T-NEXT: mov lr, r0
; ENABLE-V4T-NEXT: LBB1_2: @ %false
; ENABLE-V4T-NEXT: movs r0, #42
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: .p2align 2
; ENABLE-V4T-NEXT: @ %bb.3:
; ENABLE-V4T-NEXT: .data_region
; ENABLE-V4T-NEXT: LCPI1_0:
; ENABLE-V4T-NEXT: .long L_doSomething$non_lazy_ptr-(LPC1_0+4)
; ENABLE-V4T-NEXT: .end_data_region
;
; ENABLE-V5T-LABEL: bar:
; ENABLE-V5T: @ %bb.0:
; ENABLE-V5T-NEXT: cmp r0, r1
; ENABLE-V5T-NEXT: bge LBB1_2
; ENABLE-V5T-NEXT: @ %bb.1: @ %true
; ENABLE-V5T-NEXT: push {r7, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r7, -8
; ENABLE-V5T-NEXT: sub sp, #8
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 16
; ENABLE-V5T-NEXT: str r0, [sp, #4]
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: add r1, sp, #4
; ENABLE-V5T-NEXT: bl _doSomething
; ENABLE-V5T-NEXT: add sp, #8
; ENABLE-V5T-NEXT: pop {r7}
; ENABLE-V5T-NEXT: pop {r0}
; ENABLE-V5T-NEXT: mov lr, r0
; ENABLE-V5T-NEXT: LBB1_2: @ %false
; ENABLE-V5T-NEXT: movs r0, #42
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: bar:
; DISABLE-V4T: @ %bb.0:
; DISABLE-V4T-NEXT: push {r7, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r7, -8
; DISABLE-V4T-NEXT: sub sp, #8
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 16
; DISABLE-V4T-NEXT: cmp r0, r1
; DISABLE-V4T-NEXT: bge LBB1_2
; DISABLE-V4T-NEXT: @ %bb.1: @ %true
; DISABLE-V4T-NEXT: str r0, [sp, #4]
; DISABLE-V4T-NEXT: ldr r0, LCPI1_0
; DISABLE-V4T-NEXT: LPC1_0:
; DISABLE-V4T-NEXT: add r0, pc
; DISABLE-V4T-NEXT: ldr r2, [r0]
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: add r1, sp, #4
; DISABLE-V4T-NEXT: bl Ltmp1
; DISABLE-V4T-NEXT: LBB1_2: @ %false
; DISABLE-V4T-NEXT: movs r0, #42
; DISABLE-V4T-NEXT: add sp, #8
; DISABLE-V4T-NEXT: pop {r7}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: .p2align 2
; DISABLE-V4T-NEXT: @ %bb.3:
; DISABLE-V4T-NEXT: .data_region
; DISABLE-V4T-NEXT: LCPI1_0:
; DISABLE-V4T-NEXT: .long L_doSomething$non_lazy_ptr-(LPC1_0+4)
; DISABLE-V4T-NEXT: .end_data_region
;
; DISABLE-V5T-LABEL: bar:
; DISABLE-V5T: @ %bb.0:
; DISABLE-V5T-NEXT: push {r7, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r7, -8
; DISABLE-V5T-NEXT: sub sp, #8
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 16
; DISABLE-V5T-NEXT: cmp r0, r1
; DISABLE-V5T-NEXT: bge LBB1_2
; DISABLE-V5T-NEXT: @ %bb.1: @ %true
; DISABLE-V5T-NEXT: str r0, [sp, #4]
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: add r1, sp, #4
; DISABLE-V5T-NEXT: bl _doSomething
; DISABLE-V5T-NEXT: LBB1_2: @ %false
; DISABLE-V5T-NEXT: movs r0, #42
; DISABLE-V5T-NEXT: add sp, #8
; DISABLE-V5T-NEXT: pop {r7, pc}
%tmp = alloca i32, align 4
%tmp2 = icmp slt i32 %a, %b
br i1 %tmp2, label %true, label %false
true:
store i32 %a, i32* %tmp, align 4
%tmp4 = call i32 @doSomething(i32 0, i32* %tmp)
br label %false
false:
ret i32 42
}
; Function Attrs: optsize
declare i32 @doSomething(i32, i32*)
; Check that we do not perform the restore inside the loop whereas the save
; is outside.
define i32 @freqSaveAndRestoreOutsideLoop(i32 %cond, i32 %N) {
; ENABLE-V4T-LABEL: freqSaveAndRestoreOutsideLoop:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: beq LBB2_4
; ENABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: movs r1, #10
; ENABLE-V4T-NEXT: LBB2_2: @ %for.body
; ENABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r2, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: adds r0, r2, r0
; ENABLE-V4T-NEXT: subs r1, r1, #1
; ENABLE-V4T-NEXT: bne LBB2_2
; ENABLE-V4T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V4T-NEXT: lsls r0, r0, #3
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB2_4: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
;
; ENABLE-V5T-LABEL: freqSaveAndRestoreOutsideLoop:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: beq LBB2_4
; ENABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: movs r1, #10
; ENABLE-V5T-NEXT: LBB2_2: @ %for.body
; ENABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r2, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: adds r0, r2, r0
; ENABLE-V5T-NEXT: subs r1, r1, #1
; ENABLE-V5T-NEXT: bne LBB2_2
; ENABLE-V5T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V5T-NEXT: lsls r0, r0, #3
; ENABLE-V5T-NEXT: pop {r4, pc}
; ENABLE-V5T-NEXT: LBB2_4: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB2_5: @ %if.end
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: freqSaveAndRestoreOutsideLoop:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: beq LBB2_4
; DISABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: movs r1, #10
; DISABLE-V4T-NEXT: LBB2_2: @ %for.body
; DISABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r2, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: adds r0, r2, r0
; DISABLE-V4T-NEXT: subs r1, r1, #1
; DISABLE-V4T-NEXT: bne LBB2_2
; DISABLE-V4T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V4T-NEXT: lsls r0, r0, #3
; DISABLE-V4T-NEXT: b LBB2_5
; DISABLE-V4T-NEXT: LBB2_4: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB2_5: @ %if.end
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
;
; DISABLE-V5T-LABEL: freqSaveAndRestoreOutsideLoop:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: beq LBB2_4
; DISABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: movs r1, #10
; DISABLE-V5T-NEXT: LBB2_2: @ %for.body
; DISABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r2, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: adds r0, r2, r0
; DISABLE-V5T-NEXT: subs r1, r1, #1
; DISABLE-V5T-NEXT: bne LBB2_2
; DISABLE-V5T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V5T-NEXT: lsls r0, r0, #3
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: LBB2_4: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: pop {r4, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
%call = tail call i32 asm sideeffect "movs $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
declare i32 @something(...)
; Check that we do not perform the shrink-wrapping inside the loop even
; though that would be legal. The cost model must prevent that.
define i32 @freqSaveAndRestoreOutsideLoop2(i32 %cond) {
; ENABLE-V4T-LABEL: freqSaveAndRestoreOutsideLoop2:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: movs r1, #10
; ENABLE-V4T-NEXT: LBB3_1: @ %for.body
; ENABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r2, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: adds r0, r2, r0
; ENABLE-V4T-NEXT: subs r1, r1, #1
; ENABLE-V4T-NEXT: bne LBB3_1
; ENABLE-V4T-NEXT: @ %bb.2: @ %for.exit
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
;
; ENABLE-V5T-LABEL: freqSaveAndRestoreOutsideLoop2:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: movs r1, #10
; ENABLE-V5T-NEXT: LBB3_1: @ %for.body
; ENABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r2, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: adds r0, r2, r0
; ENABLE-V5T-NEXT: subs r1, r1, #1
; ENABLE-V5T-NEXT: bne LBB3_1
; ENABLE-V5T-NEXT: @ %bb.2: @ %for.exit
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: pop {r4, pc}
; ENABLE-V5T-NEXT: LBB3_3: @ %for.end
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: freqSaveAndRestoreOutsideLoop2:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: movs r1, #10
; DISABLE-V4T-NEXT: LBB3_1: @ %for.body
; DISABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r2, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: adds r0, r2, r0
; DISABLE-V4T-NEXT: subs r1, r1, #1
; DISABLE-V4T-NEXT: bne LBB3_1
; DISABLE-V4T-NEXT: @ %bb.2: @ %for.exit
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
;
; DISABLE-V5T-LABEL: freqSaveAndRestoreOutsideLoop2:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: movs r1, #10
; DISABLE-V5T-NEXT: LBB3_1: @ %for.body
; DISABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r2, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: adds r0, r2, r0
; DISABLE-V5T-NEXT: subs r1, r1, #1
; DISABLE-V5T-NEXT: bne LBB3_1
; DISABLE-V5T-NEXT: @ %bb.2: @ %for.exit
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: pop {r4, pc}
entry:
br label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %for.body, %entry
%i.04 = phi i32 [ 0, %for.preheader ], [ %inc, %for.body ]
%sum.03 = phi i32 [ 0, %for.preheader ], [ %add, %for.body ]
%call = tail call i32 asm sideeffect "movs $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.03
%inc = add nuw nsw i32 %i.04, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.exit, label %for.body
for.exit:
tail call void asm "nop", ""()
br label %for.end
for.end: ; preds = %for.body
ret i32 %add
}
; Check with a more complex case that we do not have save within the loop and
; restore outside.
define i32 @loopInfoSaveOutsideLoop(i32 %cond, i32 %N) {
; ENABLE-V4T-LABEL: loopInfoSaveOutsideLoop:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: beq LBB4_4
; ENABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: movs r1, #10
; ENABLE-V4T-NEXT: LBB4_2: @ %for.body
; ENABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r2, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: adds r0, r2, r0
; ENABLE-V4T-NEXT: subs r1, r1, #1
; ENABLE-V4T-NEXT: bne LBB4_2
; ENABLE-V4T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: lsls r0, r0, #3
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB4_4: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
;
; ENABLE-V5T-LABEL: loopInfoSaveOutsideLoop:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: beq LBB4_4
; ENABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: movs r1, #10
; ENABLE-V5T-NEXT: LBB4_2: @ %for.body
; ENABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r2, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: adds r0, r2, r0
; ENABLE-V5T-NEXT: subs r1, r1, #1
; ENABLE-V5T-NEXT: bne LBB4_2
; ENABLE-V5T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: lsls r0, r0, #3
; ENABLE-V5T-NEXT: pop {r4, pc}
; ENABLE-V5T-NEXT: LBB4_4: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB4_5: @ %if.end
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: loopInfoSaveOutsideLoop:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: beq LBB4_4
; DISABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: movs r1, #10
; DISABLE-V4T-NEXT: LBB4_2: @ %for.body
; DISABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r2, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: adds r0, r2, r0
; DISABLE-V4T-NEXT: subs r1, r1, #1
; DISABLE-V4T-NEXT: bne LBB4_2
; DISABLE-V4T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: lsls r0, r0, #3
; DISABLE-V4T-NEXT: b LBB4_5
; DISABLE-V4T-NEXT: LBB4_4: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB4_5: @ %if.end
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
;
; DISABLE-V5T-LABEL: loopInfoSaveOutsideLoop:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: beq LBB4_4
; DISABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: movs r1, #10
; DISABLE-V5T-NEXT: LBB4_2: @ %for.body
; DISABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r2, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: adds r0, r2, r0
; DISABLE-V5T-NEXT: subs r1, r1, #1
; DISABLE-V5T-NEXT: bne LBB4_2
; DISABLE-V5T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: lsls r0, r0, #3
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: LBB4_4: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: pop {r4, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
%call = tail call i32 asm sideeffect "movs $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
tail call void asm "nop", "~{r4}"()
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
declare void @somethingElse(...)
; Check with a more complex case that we do not have restore within the loop and
; save outside.
define i32 @loopInfoRestoreOutsideLoop(i32 %cond, i32 %N) nounwind {
; ENABLE-V4T-LABEL: loopInfoRestoreOutsideLoop:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: beq LBB5_4
; ENABLE-V4T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: movs r1, #10
; ENABLE-V4T-NEXT: LBB5_2: @ %for.body
; ENABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r2, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: adds r0, r2, r0
; ENABLE-V4T-NEXT: subs r1, r1, #1
; ENABLE-V4T-NEXT: bne LBB5_2
; ENABLE-V4T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V4T-NEXT: lsls r0, r0, #3
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB5_4: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: @ -- End function
; ENABLE-V4T-NEXT: .globl _emptyFrame @ -- Begin function emptyFrame
; ENABLE-V4T-NEXT: .p2align 1
; ENABLE-V4T-NEXT: .code 16 @ @emptyFrame
; ENABLE-V4T-NEXT: .thumb_func _emptyFrame
; ENABLE-V4T-NEXT: _emptyFrame:
; ENABLE-V4T-NEXT: .cfi_startproc
; ENABLE-V4T-NEXT: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: bx lr
;
; ENABLE-V5T-LABEL: loopInfoRestoreOutsideLoop:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: beq LBB5_4
; ENABLE-V5T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: movs r1, #10
; ENABLE-V5T-NEXT: LBB5_2: @ %for.body
; ENABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r2, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: adds r0, r2, r0
; ENABLE-V5T-NEXT: subs r1, r1, #1
; ENABLE-V5T-NEXT: bne LBB5_2
; ENABLE-V5T-NEXT: @ %bb.3: @ %for.end
; ENABLE-V5T-NEXT: lsls r0, r0, #3
; ENABLE-V5T-NEXT: pop {r4, pc}
; ENABLE-V5T-NEXT: LBB5_4: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB5_5: @ %if.end
; ENABLE-V5T-NEXT: bx lr
; ENABLE-V5T-NEXT: @ -- End function
; ENABLE-V5T-NEXT: .globl _emptyFrame @ -- Begin function emptyFrame
; ENABLE-V5T-NEXT: .p2align 1
; ENABLE-V5T-NEXT: .code 16 @ @emptyFrame
; ENABLE-V5T-NEXT: .thumb_func _emptyFrame
; ENABLE-V5T-NEXT: _emptyFrame:
; ENABLE-V5T-NEXT: .cfi_startproc
; ENABLE-V5T-NEXT: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: loopInfoRestoreOutsideLoop:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: beq LBB5_4
; DISABLE-V4T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: movs r1, #10
; DISABLE-V4T-NEXT: LBB5_2: @ %for.body
; DISABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r2, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: adds r0, r2, r0
; DISABLE-V4T-NEXT: subs r1, r1, #1
; DISABLE-V4T-NEXT: bne LBB5_2
; DISABLE-V4T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V4T-NEXT: lsls r0, r0, #3
; DISABLE-V4T-NEXT: b LBB5_5
; DISABLE-V4T-NEXT: LBB5_4: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB5_5: @ %if.end
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: @ -- End function
; DISABLE-V4T-NEXT: .globl _emptyFrame @ -- Begin function emptyFrame
; DISABLE-V4T-NEXT: .p2align 1
; DISABLE-V4T-NEXT: .code 16 @ @emptyFrame
; DISABLE-V4T-NEXT: .thumb_func _emptyFrame
; DISABLE-V4T-NEXT: _emptyFrame:
; DISABLE-V4T-NEXT: .cfi_startproc
; DISABLE-V4T-NEXT: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: bx lr
;
; DISABLE-V5T-LABEL: loopInfoRestoreOutsideLoop:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: beq LBB5_4
; DISABLE-V5T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: movs r1, #10
; DISABLE-V5T-NEXT: LBB5_2: @ %for.body
; DISABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r2, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: adds r0, r2, r0
; DISABLE-V5T-NEXT: subs r1, r1, #1
; DISABLE-V5T-NEXT: bne LBB5_2
; DISABLE-V5T-NEXT: @ %bb.3: @ %for.end
; DISABLE-V5T-NEXT: lsls r0, r0, #3
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: LBB5_4: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: @ -- End function
; DISABLE-V5T-NEXT: .globl _emptyFrame @ -- Begin function emptyFrame
; DISABLE-V5T-NEXT: .p2align 1
; DISABLE-V5T-NEXT: .code 16 @ @emptyFrame
; DISABLE-V5T-NEXT: .thumb_func _emptyFrame
; DISABLE-V5T-NEXT: _emptyFrame:
; DISABLE-V5T-NEXT: .cfi_startproc
; DISABLE-V5T-NEXT: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: bx lr
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %entry
tail call void asm "nop", "~{r4}"()
br label %for.body
for.body: ; preds = %for.body, %if.then
%i.05 = phi i32 [ 0, %if.then ], [ %inc, %for.body ]
%sum.04 = phi i32 [ 0, %if.then ], [ %add, %for.body ]
%call = tail call i32 asm sideeffect "movs $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
; Check that we handle function with no frame information correctly.
define i32 @emptyFrame() {
entry:
ret i32 0
}
; Check that we handle inline asm correctly.
define i32 @inlineAsm(i32 %cond, i32 %N) {
; ENABLE-V4T-LABEL: inlineAsm:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: beq LBB7_4
; ENABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #10
; ENABLE-V4T-NEXT: LBB7_2: @ %for.body
; ENABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r4, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: subs r0, r0, #1
; ENABLE-V4T-NEXT: bne LBB7_2
; ENABLE-V4T-NEXT: @ %bb.3: @ %for.exit
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: mov r8, r8
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB7_4: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
;
; ENABLE-V5T-LABEL: inlineAsm:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: beq LBB7_4
; ENABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #10
; ENABLE-V5T-NEXT: LBB7_2: @ %for.body
; ENABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r4, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: subs r0, r0, #1
; ENABLE-V5T-NEXT: bne LBB7_2
; ENABLE-V5T-NEXT: @ %bb.3: @ %for.exit
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: mov r8, r8
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: pop {r4, pc}
; ENABLE-V5T-NEXT: LBB7_4: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB7_5: @ %if.end
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: inlineAsm:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: beq LBB7_4
; DISABLE-V4T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #10
; DISABLE-V4T-NEXT: LBB7_2: @ %for.body
; DISABLE-V4T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r4, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: subs r0, r0, #1
; DISABLE-V4T-NEXT: bne LBB7_2
; DISABLE-V4T-NEXT: @ %bb.3: @ %for.exit
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: mov r8, r8
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: b LBB7_5
; DISABLE-V4T-NEXT: LBB7_4: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB7_5: @ %if.end
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
;
; DISABLE-V5T-LABEL: inlineAsm:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: beq LBB7_4
; DISABLE-V5T-NEXT: @ %bb.1: @ %for.preheader
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #10
; DISABLE-V5T-NEXT: LBB7_2: @ %for.body
; DISABLE-V5T-NEXT: @ =>This Inner Loop Header: Depth=1
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r4, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: subs r0, r0, #1
; DISABLE-V5T-NEXT: bne LBB7_2
; DISABLE-V5T-NEXT: @ %bb.3: @ %for.exit
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: mov r8, r8
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: LBB7_4: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: pop {r4, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.03 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
tail call void asm sideeffect "movs r4, #1", "~{r4}"()
%inc = add nuw nsw i32 %i.03, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.exit, label %for.body
for.exit:
tail call void asm "nop", ""()
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %for.body, %if.else
%sum.0 = phi i32 [ %mul, %if.else ], [ 0, %for.exit ]
ret i32 %sum.0
}
; Check that we handle calls to variadic functions correctly.
define i32 @callVariadicFunc(i32 %cond, i32 %N) {
; ENABLE-V4T-LABEL: callVariadicFunc:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: beq LBB8_2
; ENABLE-V4T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: sub sp, #16
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 24
; ENABLE-V4T-NEXT: str r1, [sp]
; ENABLE-V4T-NEXT: str r1, [sp, #4]
; ENABLE-V4T-NEXT: str r1, [sp, #8]
; ENABLE-V4T-NEXT: ldr r0, LCPI8_0
; ENABLE-V4T-NEXT: LPC8_0:
; ENABLE-V4T-NEXT: add r0, pc
; ENABLE-V4T-NEXT: ldr r4, [r0]
; ENABLE-V4T-NEXT: movs r0, r1
; ENABLE-V4T-NEXT: movs r2, r1
; ENABLE-V4T-NEXT: movs r3, r1
; ENABLE-V4T-NEXT: bl Ltmp2
; ENABLE-V4T-NEXT: lsls r0, r0, #3
; ENABLE-V4T-NEXT: add sp, #16
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB8_2: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: .p2align 2
; ENABLE-V4T-NEXT: @ %bb.3:
; ENABLE-V4T-NEXT: .data_region
; ENABLE-V4T-NEXT: LCPI8_0:
; ENABLE-V4T-NEXT: .long L_someVariadicFunc$non_lazy_ptr-(LPC8_0+4)
; ENABLE-V4T-NEXT: .end_data_region
;
; ENABLE-V5T-LABEL: callVariadicFunc:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: beq LBB8_2
; ENABLE-V5T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V5T-NEXT: push {r7, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r7, -8
; ENABLE-V5T-NEXT: sub sp, #16
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 24
; ENABLE-V5T-NEXT: str r1, [sp]
; ENABLE-V5T-NEXT: str r1, [sp, #4]
; ENABLE-V5T-NEXT: str r1, [sp, #8]
; ENABLE-V5T-NEXT: movs r0, r1
; ENABLE-V5T-NEXT: movs r2, r1
; ENABLE-V5T-NEXT: movs r3, r1
; ENABLE-V5T-NEXT: bl _someVariadicFunc
; ENABLE-V5T-NEXT: lsls r0, r0, #3
; ENABLE-V5T-NEXT: add sp, #16
; ENABLE-V5T-NEXT: pop {r7, pc}
; ENABLE-V5T-NEXT: LBB8_2: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB8_3: @ %if.end
; ENABLE-V5T-NEXT: bx lr
;
; DISABLE-V4T-LABEL: callVariadicFunc:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: sub sp, #16
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 24
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: beq LBB8_2
; DISABLE-V4T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V4T-NEXT: str r1, [sp]
; DISABLE-V4T-NEXT: str r1, [sp, #4]
; DISABLE-V4T-NEXT: str r1, [sp, #8]
; DISABLE-V4T-NEXT: ldr r0, LCPI8_0
; DISABLE-V4T-NEXT: LPC8_0:
; DISABLE-V4T-NEXT: add r0, pc
; DISABLE-V4T-NEXT: ldr r4, [r0]
; DISABLE-V4T-NEXT: movs r0, r1
; DISABLE-V4T-NEXT: movs r2, r1
; DISABLE-V4T-NEXT: movs r3, r1
; DISABLE-V4T-NEXT: bl Ltmp2
; DISABLE-V4T-NEXT: lsls r0, r0, #3
; DISABLE-V4T-NEXT: b LBB8_3
; DISABLE-V4T-NEXT: LBB8_2: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB8_3: @ %if.end
; DISABLE-V4T-NEXT: add sp, #16
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: .p2align 2
; DISABLE-V4T-NEXT: @ %bb.4:
; DISABLE-V4T-NEXT: .data_region
; DISABLE-V4T-NEXT: LCPI8_0:
; DISABLE-V4T-NEXT: .long L_someVariadicFunc$non_lazy_ptr-(LPC8_0+4)
; DISABLE-V4T-NEXT: .end_data_region
;
; DISABLE-V5T-LABEL: callVariadicFunc:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r7, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r7, -8
; DISABLE-V5T-NEXT: sub sp, #16
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 24
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: beq LBB8_2
; DISABLE-V5T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V5T-NEXT: str r1, [sp]
; DISABLE-V5T-NEXT: str r1, [sp, #4]
; DISABLE-V5T-NEXT: str r1, [sp, #8]
; DISABLE-V5T-NEXT: movs r0, r1
; DISABLE-V5T-NEXT: movs r2, r1
; DISABLE-V5T-NEXT: movs r3, r1
; DISABLE-V5T-NEXT: bl _someVariadicFunc
; DISABLE-V5T-NEXT: lsls r0, r0, #3
; DISABLE-V5T-NEXT: add sp, #16
; DISABLE-V5T-NEXT: pop {r7, pc}
; DISABLE-V5T-NEXT: LBB8_2: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: add sp, #16
; DISABLE-V5T-NEXT: pop {r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %entry
%call = tail call i32 (i32, ...) @someVariadicFunc(i32 %N, i32 %N, i32 %N, i32 %N, i32 %N, i32 %N, i32 %N)
%shl = shl i32 %call, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %if.then
%sum.0 = phi i32 [ %shl, %if.then ], [ %mul, %if.else ]
ret i32 %sum.0
}
declare i32 @someVariadicFunc(i32, ...)
; Make sure we do not insert unreachable code after noreturn function.
; Although this is not incorrect to insert such code, it is useless
; and it hurts the binary size.
;
define i32 @noreturn(i8 signext %bad_thing) {
; ENABLE-V4T-LABEL: noreturn:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: cmp r0, #0
; ENABLE-V4T-NEXT: bne LBB9_2
; ENABLE-V4T-NEXT: @ %bb.1: @ %if.end
; ENABLE-V4T-NEXT: movs r0, #42
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: LBB9_2: @ %if.abort
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: ldr r0, LCPI9_0
; ENABLE-V4T-NEXT: LPC9_0:
; ENABLE-V4T-NEXT: add r0, pc
; ENABLE-V4T-NEXT: ldr r0, [r0]
; ENABLE-V4T-NEXT: @ InlineAsm Start
; ENABLE-V4T-NEXT: movs r1, #1
; ENABLE-V4T-NEXT: @ InlineAsm End
; ENABLE-V4T-NEXT: bl Ltmp3
; ENABLE-V4T-NEXT: .p2align 2
; ENABLE-V4T-NEXT: @ %bb.3:
; ENABLE-V4T-NEXT: .data_region
; ENABLE-V4T-NEXT: LCPI9_0:
; ENABLE-V4T-NEXT: .long L_abort$non_lazy_ptr-(LPC9_0+4)
; ENABLE-V4T-NEXT: .end_data_region
;
; ENABLE-V5T-LABEL: noreturn:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: cmp r0, #0
; ENABLE-V5T-NEXT: bne LBB9_2
; ENABLE-V5T-NEXT: @ %bb.1: @ %if.end
; ENABLE-V5T-NEXT: movs r0, #42
; ENABLE-V5T-NEXT: bx lr
; ENABLE-V5T-NEXT: LBB9_2: @ %if.abort
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: @ InlineAsm Start
; ENABLE-V5T-NEXT: movs r0, #1
; ENABLE-V5T-NEXT: @ InlineAsm End
; ENABLE-V5T-NEXT: bl _abort
;
; DISABLE-V4T-LABEL: noreturn:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: cmp r0, #0
; DISABLE-V4T-NEXT: bne LBB9_2
; DISABLE-V4T-NEXT: @ %bb.1: @ %if.end
; DISABLE-V4T-NEXT: movs r0, #42
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: LBB9_2: @ %if.abort
; DISABLE-V4T-NEXT: ldr r0, LCPI9_0
; DISABLE-V4T-NEXT: LPC9_0:
; DISABLE-V4T-NEXT: add r0, pc
; DISABLE-V4T-NEXT: ldr r0, [r0]
; DISABLE-V4T-NEXT: @ InlineAsm Start
; DISABLE-V4T-NEXT: movs r1, #1
; DISABLE-V4T-NEXT: @ InlineAsm End
; DISABLE-V4T-NEXT: bl Ltmp3
; DISABLE-V4T-NEXT: .p2align 2
; DISABLE-V4T-NEXT: @ %bb.3:
; DISABLE-V4T-NEXT: .data_region
; DISABLE-V4T-NEXT: LCPI9_0:
; DISABLE-V4T-NEXT: .long L_abort$non_lazy_ptr-(LPC9_0+4)
; DISABLE-V4T-NEXT: .end_data_region
;
; DISABLE-V5T-LABEL: noreturn:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: cmp r0, #0
; DISABLE-V5T-NEXT: bne LBB9_2
; DISABLE-V5T-NEXT: @ %bb.1: @ %if.end
; DISABLE-V5T-NEXT: movs r0, #42
; DISABLE-V5T-NEXT: pop {r4, pc}
; DISABLE-V5T-NEXT: LBB9_2: @ %if.abort
; DISABLE-V5T-NEXT: @ InlineAsm Start
; DISABLE-V5T-NEXT: movs r0, #1
; DISABLE-V5T-NEXT: @ InlineAsm End
; DISABLE-V5T-NEXT: bl _abort
entry:
%tobool = icmp eq i8 %bad_thing, 0
br i1 %tobool, label %if.end, label %if.abort
if.abort:
%call = tail call i32 asm sideeffect "movs $0, #1", "=r,~{r4}"()
tail call void @abort() #0
unreachable
if.end:
ret i32 42
}
declare void @abort() #0
define i32 @b_to_bx(i32 %value) {
; ENABLE-V4T-LABEL: b_to_bx:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: movs r1, r0
; ENABLE-V4T-NEXT: cmp r0, #49
; ENABLE-V4T-NEXT: bgt LBB10_2
; ENABLE-V4T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V4T-NEXT: push {r7, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r7, -8
; ENABLE-V4T-NEXT: ldr r0, LCPI10_0
; ENABLE-V4T-NEXT: ldr r2, LCPI10_1
; ENABLE-V4T-NEXT: LPC10_0:
; ENABLE-V4T-NEXT: add r2, pc
; ENABLE-V4T-NEXT: bl Ltmp4
; ENABLE-V4T-NEXT: pop {r7}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
; ENABLE-V4T-NEXT: LBB10_2: @ %if.else
; ENABLE-V4T-NEXT: lsls r0, r1, #1
; ENABLE-V4T-NEXT: bx lr
; ENABLE-V4T-NEXT: .p2align 2
; ENABLE-V4T-NEXT: @ %bb.3:
; ENABLE-V4T-NEXT: .data_region
; ENABLE-V4T-NEXT: LCPI10_0:
; ENABLE-V4T-NEXT: .long 5000 @ 0x1388
; ENABLE-V4T-NEXT: LCPI10_1:
; ENABLE-V4T-NEXT: .long ___divsi3-(LPC10_0+4)
; ENABLE-V4T-NEXT: .end_data_region
;
; ENABLE-V5T-LABEL: b_to_bx:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: movs r1, r0
; ENABLE-V5T-NEXT: cmp r0, #49
; ENABLE-V5T-NEXT: bgt LBB10_2
; ENABLE-V5T-NEXT: @ %bb.1: @ %if.then
; ENABLE-V5T-NEXT: push {r7, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r7, -8
; ENABLE-V5T-NEXT: ldr r0, LCPI10_0
; ENABLE-V5T-NEXT: bl ___divsi3
; ENABLE-V5T-NEXT: pop {r7, pc}
; ENABLE-V5T-NEXT: LBB10_2: @ %if.else
; ENABLE-V5T-NEXT: lsls r0, r1, #1
; ENABLE-V5T-NEXT: LBB10_3: @ %if.end
; ENABLE-V5T-NEXT: bx lr
; ENABLE-V5T-NEXT: .p2align 2
; ENABLE-V5T-NEXT: @ %bb.4:
; ENABLE-V5T-NEXT: .data_region
; ENABLE-V5T-NEXT: LCPI10_0:
; ENABLE-V5T-NEXT: .long 5000 @ 0x1388
; ENABLE-V5T-NEXT: .end_data_region
;
; DISABLE-V4T-LABEL: b_to_bx:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r7, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r7, -8
; DISABLE-V4T-NEXT: movs r1, r0
; DISABLE-V4T-NEXT: cmp r0, #49
; DISABLE-V4T-NEXT: bgt LBB10_2
; DISABLE-V4T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V4T-NEXT: ldr r0, LCPI10_0
; DISABLE-V4T-NEXT: ldr r2, LCPI10_1
; DISABLE-V4T-NEXT: LPC10_0:
; DISABLE-V4T-NEXT: add r2, pc
; DISABLE-V4T-NEXT: bl Ltmp4
; DISABLE-V4T-NEXT: b LBB10_3
; DISABLE-V4T-NEXT: LBB10_2: @ %if.else
; DISABLE-V4T-NEXT: lsls r0, r1, #1
; DISABLE-V4T-NEXT: LBB10_3: @ %if.end
; DISABLE-V4T-NEXT: pop {r7}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
; DISABLE-V4T-NEXT: .p2align 2
; DISABLE-V4T-NEXT: @ %bb.4:
; DISABLE-V4T-NEXT: .data_region
; DISABLE-V4T-NEXT: LCPI10_0:
; DISABLE-V4T-NEXT: .long 5000 @ 0x1388
; DISABLE-V4T-NEXT: LCPI10_1:
; DISABLE-V4T-NEXT: .long ___divsi3-(LPC10_0+4)
; DISABLE-V4T-NEXT: .end_data_region
;
; DISABLE-V5T-LABEL: b_to_bx:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r7, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r7, -8
; DISABLE-V5T-NEXT: movs r1, r0
; DISABLE-V5T-NEXT: cmp r0, #49
; DISABLE-V5T-NEXT: bgt LBB10_2
; DISABLE-V5T-NEXT: @ %bb.1: @ %if.then
; DISABLE-V5T-NEXT: ldr r0, LCPI10_0
; DISABLE-V5T-NEXT: bl ___divsi3
; DISABLE-V5T-NEXT: pop {r7, pc}
; DISABLE-V5T-NEXT: LBB10_2: @ %if.else
; DISABLE-V5T-NEXT: lsls r0, r1, #1
; DISABLE-V5T-NEXT: pop {r7, pc}
; DISABLE-V5T-NEXT: .p2align 2
; DISABLE-V5T-NEXT: @ %bb.3:
; DISABLE-V5T-NEXT: .data_region
; DISABLE-V5T-NEXT: LCPI10_0:
; DISABLE-V5T-NEXT: .long 5000 @ 0x1388
; DISABLE-V5T-NEXT: .end_data_region
entry:
%cmp = icmp slt i32 %value, 50
br i1 %cmp, label %if.then, label %if.else
if.then:
%div = sdiv i32 5000, %value
br label %if.end
if.else:
%mul = shl nsw i32 %value, 1
br label %if.end
if.end:
%value.addr.0 = phi i32 [ %div, %if.then ], [ %mul, %if.else ]
ret i32 %value.addr.0
}
define i1 @beq_to_bx(i32* %y, i32 %head) {
; ENABLE-V4T-LABEL: beq_to_bx:
; ENABLE-V4T: @ %bb.0: @ %entry
; ENABLE-V4T-NEXT: push {r4, lr}
; ENABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V4T-NEXT: .cfi_offset lr, -4
; ENABLE-V4T-NEXT: .cfi_offset r4, -8
; ENABLE-V4T-NEXT: movs r2, r0
; ENABLE-V4T-NEXT: movs r0, #1
; ENABLE-V4T-NEXT: cmp r2, #0
; ENABLE-V4T-NEXT: beq LBB11_3
; ENABLE-V4T-NEXT: @ %bb.1: @ %if.end
; ENABLE-V4T-NEXT: ldr r3, [r2]
; ENABLE-V4T-NEXT: lsls r4, r3, #30
; ENABLE-V4T-NEXT: bpl LBB11_3
; ENABLE-V4T-NEXT: @ %bb.2: @ %if.end4
; ENABLE-V4T-NEXT: str r1, [r2]
; ENABLE-V4T-NEXT: str r3, [r2]
; ENABLE-V4T-NEXT: movs r0, #0
; ENABLE-V4T-NEXT: LBB11_3: @ %cleanup
; ENABLE-V4T-NEXT: pop {r4}
; ENABLE-V4T-NEXT: pop {r1}
; ENABLE-V4T-NEXT: bx r1
;
; ENABLE-V5T-LABEL: beq_to_bx:
; ENABLE-V5T: @ %bb.0: @ %entry
; ENABLE-V5T-NEXT: push {r4, lr}
; ENABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; ENABLE-V5T-NEXT: .cfi_offset lr, -4
; ENABLE-V5T-NEXT: .cfi_offset r4, -8
; ENABLE-V5T-NEXT: movs r2, r0
; ENABLE-V5T-NEXT: movs r0, #1
; ENABLE-V5T-NEXT: cmp r2, #0
; ENABLE-V5T-NEXT: beq LBB11_3
; ENABLE-V5T-NEXT: @ %bb.1: @ %if.end
; ENABLE-V5T-NEXT: ldr r3, [r2]
; ENABLE-V5T-NEXT: lsls r4, r3, #30
; ENABLE-V5T-NEXT: bpl LBB11_3
; ENABLE-V5T-NEXT: @ %bb.2: @ %if.end4
; ENABLE-V5T-NEXT: str r1, [r2]
; ENABLE-V5T-NEXT: str r3, [r2]
; ENABLE-V5T-NEXT: movs r0, #0
; ENABLE-V5T-NEXT: LBB11_3: @ %cleanup
; ENABLE-V5T-NEXT: pop {r4, pc}
;
; DISABLE-V4T-LABEL: beq_to_bx:
; DISABLE-V4T: @ %bb.0: @ %entry
; DISABLE-V4T-NEXT: push {r4, lr}
; DISABLE-V4T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V4T-NEXT: .cfi_offset lr, -4
; DISABLE-V4T-NEXT: .cfi_offset r4, -8
; DISABLE-V4T-NEXT: movs r2, r0
; DISABLE-V4T-NEXT: movs r0, #1
; DISABLE-V4T-NEXT: cmp r2, #0
; DISABLE-V4T-NEXT: beq LBB11_3
; DISABLE-V4T-NEXT: @ %bb.1: @ %if.end
; DISABLE-V4T-NEXT: ldr r3, [r2]
; DISABLE-V4T-NEXT: lsls r4, r3, #30
; DISABLE-V4T-NEXT: bpl LBB11_3
; DISABLE-V4T-NEXT: @ %bb.2: @ %if.end4
; DISABLE-V4T-NEXT: str r1, [r2]
; DISABLE-V4T-NEXT: str r3, [r2]
; DISABLE-V4T-NEXT: movs r0, #0
; DISABLE-V4T-NEXT: LBB11_3: @ %cleanup
; DISABLE-V4T-NEXT: pop {r4}
; DISABLE-V4T-NEXT: pop {r1}
; DISABLE-V4T-NEXT: bx r1
;
; DISABLE-V5T-LABEL: beq_to_bx:
; DISABLE-V5T: @ %bb.0: @ %entry
; DISABLE-V5T-NEXT: push {r4, lr}
; DISABLE-V5T-NEXT: .cfi_def_cfa_offset 8
; DISABLE-V5T-NEXT: .cfi_offset lr, -4
; DISABLE-V5T-NEXT: .cfi_offset r4, -8
; DISABLE-V5T-NEXT: movs r2, r0
; DISABLE-V5T-NEXT: movs r0, #1
; DISABLE-V5T-NEXT: cmp r2, #0
; DISABLE-V5T-NEXT: beq LBB11_3
; DISABLE-V5T-NEXT: @ %bb.1: @ %if.end
; DISABLE-V5T-NEXT: ldr r3, [r2]
; DISABLE-V5T-NEXT: lsls r4, r3, #30
; DISABLE-V5T-NEXT: bpl LBB11_3
; DISABLE-V5T-NEXT: @ %bb.2: @ %if.end4
; DISABLE-V5T-NEXT: str r1, [r2]
; DISABLE-V5T-NEXT: str r3, [r2]
; DISABLE-V5T-NEXT: movs r0, #0
; DISABLE-V5T-NEXT: LBB11_3: @ %cleanup
; DISABLE-V5T-NEXT: pop {r4, pc}
entry:
%cmp = icmp eq i32* %y, null
br i1 %cmp, label %cleanup, label %if.end
if.end:
%z = load i32, i32* %y, align 4
%and = and i32 %z, 2
%cmp2 = icmp eq i32 %and, 0
br i1 %cmp2, label %cleanup, label %if.end4
if.end4:
store i32 %head, i32* %y, align 4
store volatile i32 %z, i32* %y, align 4
br label %cleanup
cleanup:
%retval.0 = phi i1 [ 0, %if.end4 ], [ 1, %entry ], [ 1, %if.end ]
ret i1 %retval.0
}
attributes #0 = { noreturn nounwind }
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