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llvm-mirror/test/CodeGen/AArch64/aarch64-dynamic-stack-layout.ll
Geoff Berry 9151cce5f4 [PEI, AArch64] Use empty spaces in stack area for local stack slot allocation. 
Summary:
If the target requests it, use emptry spaces in the fixed and
callee-save stack area to allocate local stack objects.

AArch64: Change last callee-save reg stack object alignment instead of
size to leave a gap to take advantage of above change.

Reviewers: t.p.northover, qcolombet, MatzeB

Subscribers: rengolin, mcrosier, llvm-commits, aemerson

Differential Revision: http://reviews.llvm.org/D20220

llvm-svn: 271527
2016-06-02 16:22:07 +00:00

707 lines
28 KiB
LLVM
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; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -disable-post-ra < %s | FileCheck %s
; RUN: llc -verify-machineinstrs -mtriple=arm64-apple-ios -disable-fp-elim -disable-post-ra < %s | FileCheck %s --check-prefix=CHECK-MACHO
; This test aims to check basic correctness of frame layout &
; frame access code. There are 8 functions in this test file,
; each function implements one element in the cartesian product
; of:
; . a function having a VLA/noVLA
; . a function with dynamic stack realignment/no dynamic stack realignment.
; . a function needing a frame pionter/no frame pointer,
; since the presence/absence of these has influence on the frame
; layout and which pointer to use to access various part of the
; frame (bp,sp,fp).
;
; Furthermore: in every test function:
; . there is always one integer and 1 floating point argument to be able
; to check those are accessed correctly.
; . there is always one local variable to check that is accessed
; correctly
;
; The LLVM-IR below was produced by clang on the following C++ code:
;extern "C" int g();
;extern "C" int novla_nodynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; volatile int l1;
; return i10 + (int)d10 + l1 + g();
;}
;extern "C" int novla_nodynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; volatile int l1;
; return i10 + (int)d10 + l1;
;}
;extern "C" int novla_dynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; alignas(128) volatile int l1;
; return i10 + (int)d10 + l1 + g();
;}
;extern "C" int novla_dynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; alignas(128) volatile int l1;
; return i10 + (int)d10 + l1;
;}
;
;extern "C" int vla_nodynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; volatile int l1;
; volatile int vla[i1];
; return i10 + (int)d10 + l1 + g() + vla[0];
;}
;extern "C" int vla_nodynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; volatile int l1;
; volatile int vla[i1];
; return i10 + (int)d10 + l1 + vla[0];
;}
;extern "C" int vla_dynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; alignas(128) volatile int l1;
; volatile int vla[i1];
; return i10 + (int)d10 + l1 + g() + vla[0];
;}
;extern "C" int vla_dynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
;{
; // use an argument passed on the stack.
; alignas(128) volatile int l1;
; volatile int vla[i1];
; return i10 + (int)d10 + l1 + vla[0];
;}
define i32 @novla_nodynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
entry:
%l1 = alloca i32, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
%add1 = add nsw i32 %add, %l1.0.l1.0.
%call = tail call i32 @g()
%add2 = add nsw i32 %add1, %call
ret i32 %add2
}
; CHECK-LABEL: novla_nodynamicrealign_call
; CHECK: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK: sub sp, sp, #32
; CHECK: stp x19, x30, [sp, #16]
; Check correctness of cfi pseudo-instructions
; CHECK: .cfi_def_cfa_offset 32
; CHECK: .cfi_offset w30, -8
; CHECK: .cfi_offset w19, -16
; Check correct access to arguments passed on the stack, through stack pointer
; CHECK: ldr d[[DARG:[0-9]+]], [sp, #56]
; CHECK: ldr w[[IARG:[0-9]+]], [sp, #40]
; Check correct access to local variable on the stack, through stack pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [sp, #12]
; Check epilogue:
; CHECK: ldp x19, x30, [sp, #16]
; CHECK: ret
; CHECK: .cfi_endproc
; CHECK-MACHO-LABEL: _novla_nodynamicrealign_call:
; CHECK-MACHO: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK-MACHO: sub sp, sp, #48
; CHECK-MACHO: stp x20, x19, [sp, #16]
; Check that the frame pointer is created:
; CHECK-MACHO: stp x29, x30, [sp, #32]
; CHECK-MACHO: add x29, sp, #32
; Check correctness of cfi pseudo-instructions
; CHECK-MACHO: .cfi_def_cfa w29, 16
; CHECK-MACHO: .cfi_offset w30, -8
; CHECK-MACHO: .cfi_offset w29, -16
; CHECK-MACHO: .cfi_offset w19, -24
; CHECK-MACHO: .cfi_offset w20, -32
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK-MACHO: ldr d[[DARG:[0-9]+]], [x29, #32]
; CHECK-MACHO: ldr w[[IARG:[0-9]+]], [x29, #20]
; Check correct access to local variable on the stack, through stack pointer
; CHECK-MACHO: ldr w[[ILOC:[0-9]+]], [sp, #12]
; Check epilogue:
; CHECK-MACHO: ldp x29, x30, [sp, #32]
; CHECK-MACHO: ldp x20, x19, [sp, #16]
; CHECK-MACHO: ret
; CHECK-MACHO: .cfi_endproc
declare i32 @g() #0
; Function Attrs: nounwind
define i32 @novla_nodynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
entry:
%l1 = alloca i32, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
%add1 = add nsw i32 %add, %l1.0.l1.0.
ret i32 %add1
}
; CHECK-LABEL: novla_nodynamicrealign_nocall
; Check that space is reserved for one local variable on the stack.
; CHECK: sub sp, sp, #16 // =16
; Check correct access to arguments passed on the stack, through stack pointer
; CHECK: ldr d[[DARG:[0-9]+]], [sp, #40]
; CHECK: ldr w[[IARG:[0-9]+]], [sp, #24]
; Check correct access to local variable on the stack, through stack pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [sp, #12]
; Check epilogue:
; CHECK: add sp, sp, #16 // =16
; CHECK: ret
define i32 @novla_dynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
entry:
%l1 = alloca i32, align 128
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
%add1 = add nsw i32 %add, %l1.0.l1.0.
%call = tail call i32 @g()
%add2 = add nsw i32 %add1, %call
ret i32 %add2
}
; CHECK-LABEL: novla_dynamicrealign_call
; CHECK: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK: str x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #16]
; CHECK: add x29, sp, #16
; Check the dynamic realignment of the stack pointer to a 128-byte boundary
; CHECK: sub x9, sp, #96
; CHECK: and sp, x9, #0xffffffffffffff80
; Check correctness of cfi pseudo-instructions
; CHECK: .cfi_def_cfa w29, 16
; CHECK: .cfi_offset w30, -8
; CHECK: .cfi_offset w29, -16
; CHECK: .cfi_offset w19, -32
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; Check correct access to local variable on the stack, through re-aligned stack pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [sp]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: sub sp, x29, #16 // =16
; CHECK: ldp x29, x30, [sp, #16]
; CHECK: ldr x19, [sp], #32
; CHECK: ret
; CHECK: .cfi_endproc
; CHECK-MACHO-LABEL: _novla_dynamicrealign_call:
; CHECK-MACHO: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK-MACHO: stp x20, x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK-MACHO: stp x29, x30, [sp, #16]
; CHECK-MACHO: add x29, sp, #16
; Check the dynamic realignment of the stack pointer to a 128-byte boundary
; CHECK-MACHO: sub x9, sp, #96
; CHECK-MACHO: and sp, x9, #0xffffffffffffff80
; Check correctness of cfi pseudo-instructions
; CHECK-MACHO: .cfi_def_cfa w29, 16
; CHECK-MACHO: .cfi_offset w30, -8
; CHECK-MACHO: .cfi_offset w29, -16
; CHECK-MACHO: .cfi_offset w19, -24
; CHECK-MACHO: .cfi_offset w20, -32
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK-MACHO: ldr d[[DARG:[0-9]+]], [x29, #32]
; CHECK-MACHO: ldr w[[IARG:[0-9]+]], [x29, #20]
; Check correct access to local variable on the stack, through re-aligned stack pointer
; CHECK-MACHO: ldr w[[ILOC:[0-9]+]], [sp]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK-MACHO: sub sp, x29, #16
; CHECK-MACHO: ldp x29, x30, [sp, #16]
; CHECK-MACHO: ldp x20, x19, [sp], #32
; CHECK-MACHO: ret
; CHECK-MACHO: .cfi_endproc
; Function Attrs: nounwind
define i32 @novla_dynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
entry:
%l1 = alloca i32, align 128
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
%add1 = add nsw i32 %add, %l1.0.l1.0.
ret i32 %add1
}
; CHECK-LABEL: novla_dynamicrealign_nocall
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #-16]!
; CHECK: mov x29, sp
; Check the dynamic realignment of the stack pointer to a 128-byte boundary
; CHECK: sub x9, sp, #112
; CHECK: and sp, x9, #0xffffffffffffff80
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; Check correct access to local variable on the stack, through re-aligned stack pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [sp]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: mov sp, x29
; CHECK: ldp x29, x30, [sp], #16
; CHECK: ret
define i32 @vla_nodynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
entry:
%l1 = alloca i32, align 4
%0 = zext i32 %i1 to i64
%vla = alloca i32, i64 %0, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
%add1 = add nsw i32 %add, %l1.0.l1.0.
%call = tail call i32 @g()
%add2 = add nsw i32 %add1, %call
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
%add3 = add nsw i32 %add2, %1
ret i32 %add3
}
; CHECK-LABEL: vla_nodynamicrealign_call
; CHECK: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK: stp x20, x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #16]
; CHECK: add x29, sp, #16
; Check that space is reserved on the stack for the local variable,
; rounded up to a multiple of 16 to keep the stack pointer 16-byte aligned.
; CHECK: sub sp, sp, #16
; Check correctness of cfi pseudo-instructions
; CHECK: .cfi_def_cfa w29, 16
; CHECK: .cfi_offset w30, -8
; CHECK: .cfi_offset w29, -16
; CHECK: .cfi_offset w19, -24
; CHECK: .cfi_offset w20, -32
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; CHECK: mov w9, w0
; CHECK: mov x10, sp
; CHECK: lsl x9, x9, #2
; CHECK: add x9, x9, #15
; CHECK: and x9, x9, #0x7fffffff0
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through frame pointer
; CHECK: ldur w[[ILOC:[0-9]+]], [x29, #-20]
; Check correct accessing of the VLA variable through the base pointer
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: sub sp, x29, #16 // =16
; CHECK: ldp x29, x30, [sp, #16]
; CHECK: ldp x20, x19, [sp], #32
; CHECK: ret
; CHECK: .cfi_endproc
; Function Attrs: nounwind
define i32 @vla_nodynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
entry:
%l1 = alloca i32, align 4
%0 = zext i32 %i1 to i64
%vla = alloca i32, i64 %0, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
%add1 = add nsw i32 %add, %l1.0.l1.0.
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
%add2 = add nsw i32 %add1, %1
ret i32 %add2
}
; CHECK-LABEL: vla_nodynamicrealign_nocall
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #-16]!
; CHECK: mov x29, sp
; Check that space is reserved on the stack for the local variable,
; rounded up to a multiple of 16 to keep the stack pointer 16-byte aligned.
; CHECK: sub sp, sp, #16
; Check correctness of cfi pseudo-instructions
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; CHECK: mov w9, w0
; CHECK: mov x10, sp
; CHECK: lsl x9, x9, #2
; CHECK: add x9, x9, #15
; CHECK: and x9, x9, #0x7fffffff0
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through frame pointer
; CHECK: ldur w[[ILOC:[0-9]+]], [x29, #-4]
; Check correct accessing of the VLA variable through the base pointer
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: mov sp, x29
; CHECK: ldp x29, x30, [sp], #16
; CHECK: ret
define i32 @vla_dynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
entry:
%l1 = alloca i32, align 128
%0 = zext i32 %i1 to i64
%vla = alloca i32, i64 %0, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
%add1 = add nsw i32 %add, %l1.0.l1.0.
%call = tail call i32 @g()
%add2 = add nsw i32 %add1, %call
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
%add3 = add nsw i32 %add2, %1
ret i32 %add3
}
; CHECK-LABEL: vla_dynamicrealign_call
; CHECK: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK: str x21, [sp, #-48]!
; CHECK: stp x20, x19, [sp, #16]
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #32]
; CHECK: add x29, sp, #32
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK: sub x9, sp, #80 // =80
; CHECK: and sp, x9, #0xffffffffffffff80
; CHECK: mov x19, sp
; Check correctness of cfi pseudo-instructions
; CHECK: .cfi_def_cfa w29, 16
; CHECK: .cfi_offset w30, -8
; CHECK: .cfi_offset w29, -16
; CHECK: .cfi_offset w19, -24
; CHECK: .cfi_offset w20, -32
; CHECK: .cfi_offset w21, -48
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK: mov w9, w0
; CHECK: mov x10, sp
; CHECK: lsl x9, x9, #2
; CHECK: add x9, x9, #15
; CHECK: and x9, x9, #0x7fffffff0
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: sub sp, x29, #32
; CHECK: ldp x29, x30, [sp, #32]
; CHECK: ldp x20, x19, [sp, #16]
; CHECK: ldr x21, [sp], #48
; CHECK: ret
; CHECK: .cfi_endproc
; CHECK-MACHO-LABEL: _vla_dynamicrealign_call:
; CHECK-MACHO: .cfi_startproc
; Check that used callee-saved registers are saved
; CHECK-MACHO: stp x22, x21, [sp, #-48]!
; CHECK-MACHO: stp x20, x19, [sp, #16]
; Check that the frame pointer is created:
; CHECK-MACHO: stp x29, x30, [sp, #32]
; CHECK-MACHO: add x29, sp, #32
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK-MACHO: sub x9, sp, #80
; CHECK-MACHO: and sp, x9, #0xffffffffffffff80
; CHECK-MACHO: mov x19, sp
; Check correctness of cfi pseudo-instructions
; CHECK-MACHO: .cfi_def_cfa w29, 16
; CHECK-MACHO: .cfi_offset w30, -8
; CHECK-MACHO: .cfi_offset w29, -16
; CHECK-MACHO: .cfi_offset w19, -24
; CHECK-MACHO: .cfi_offset w20, -32
; CHECK-MACHO: .cfi_offset w21, -40
; CHECK-MACHO: .cfi_offset w22, -48
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK-MACHO: ldr w[[IARG:[0-9]+]], [x29, #20]
; CHECK-MACHO: ldr d[[DARG:[0-9]+]], [x29, #32]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK-MACHO: mov w9, w0
; CHECK-MACHO: mov x10, sp
; CHECK-MACHO: lsl x9, x9, #2
; CHECK-MACHO: add x9, x9, #15
; CHECK-MACHO: and x9, x9, #0x7fffffff0
; CHECK-MACHO: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK-MACHO: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK-MACHO: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK-MACHO: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK-MACHO: sub sp, x29, #32
; CHECK-MACHO: ldp x29, x30, [sp, #32]
; CHECK-MACHO: ldp x20, x19, [sp, #16]
; CHECK-MACHO: ldp x22, x21, [sp], #48
; CHECK-MACHO: ret
; CHECK-MACHO: .cfi_endproc
; Function Attrs: nounwind
define i32 @vla_dynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
entry:
%l1 = alloca i32, align 128
%0 = zext i32 %i1 to i64
%vla = alloca i32, i64 %0, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
%add1 = add nsw i32 %add, %l1.0.l1.0.
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
%add2 = add nsw i32 %add1, %1
ret i32 %add2
}
; CHECK-LABEL: vla_dynamicrealign_nocall
; Check that used callee-saved registers are saved
; CHECK: str x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #16]
; CHECK: add x29, sp, #16
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK: sub x9, sp, #96
; CHECK: and sp, x9, #0xffffffffffffff80
; CHECK: mov x19, sp
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK: mov w9, w0
; CHECK: mov x10, sp
; CHECK: lsl x9, x9, #2
; CHECK: add x9, x9, #15
; CHECK: and x9, x9, #0x7fffffff0
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: sub sp, x29, #16
; CHECK: ldp x29, x30, [sp, #16]
; CHECK: ldr x19, [sp], #32
; CHECK: ret
; CHECK-MACHO-LABEL: _vla_dynamicrealign_nocall:
; Check that used callee-saved registers are saved
; CHECK-MACHO: stp x20, x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK-MACHO: stp x29, x30, [sp, #16]
; CHECK-MACHO: add x29, sp, #16
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK-MACHO: sub x9, sp, #96
; CHECK-MACHO: and sp, x9, #0xffffffffffffff80
; CHECK-MACHO: mov x19, sp
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK-MACHO: ldr w[[IARG:[0-9]+]], [x29, #20]
; CHECK-MACHO: ldr d[[DARG:[0-9]+]], [x29, #32]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK-MACHO: mov w9, w0
; CHECK-MACHO: mov x10, sp
; CHECK-MACHO: lsl x9, x9, #2
; CHECK-MACHO: add x9, x9, #15
; CHECK-MACHO: and x9, x9, #0x7fffffff0
; CHECK-MACHO: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK-MACHO: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK-MACHO: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK-MACHO: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK-MACHO: sub sp, x29, #16
; CHECK-MACHO: ldp x29, x30, [sp, #16]
; CHECK-MACHO: ldp x20, x19, [sp], #32
; CHECK-MACHO: ret
; Function Attrs: nounwind
define i32 @vla_dynamicrealign_nocall_large_align(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
entry:
%l1 = alloca i32, align 32768
%0 = zext i32 %i1 to i64
%vla = alloca i32, i64 %0, align 4
%conv = fptosi double %d10 to i32
%add = add nsw i32 %conv, %i10
%l1.0.l1.0. = load volatile i32, i32* %l1, align 32768
%add1 = add nsw i32 %add, %l1.0.l1.0.
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
%add2 = add nsw i32 %add1, %1
ret i32 %add2
}
; CHECK-LABEL: vla_dynamicrealign_nocall_large_align
; Check that used callee-saved registers are saved
; CHECK: stp x28, x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK: stp x29, x30, [sp, #16]
; CHECK: add x29, sp, #16
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK: sub x9, sp, #7, lsl #12
; CHECK: and sp, x9, #0xffffffffffff8000
; CHECK: mov x19, sp
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK: mov w9, w0
; CHECK: mov x10, sp
; CHECK: lsl x9, x9, #2
; CHECK: add x9, x9, #15
; CHECK: and x9, x9, #0x7fffffff0
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK: sub sp, x29, #16
; CHECK: ldp x29, x30, [sp, #16]
; CHECK: ldp x28, x19, [sp], #32
; CHECK: ret
; CHECK-MACHO-LABEL: _vla_dynamicrealign_nocall_large_align:
; Check that used callee-saved registers are saved
; CHECK-MACHO: stp x20, x19, [sp, #-32]!
; Check that the frame pointer is created:
; CHECK-MACHO: stp x29, x30, [sp, #16]
; CHECK-MACHO: add x29, sp, #16
; Check that the stack pointer gets re-aligned to 128
; bytes & the base pointer (x19) gets initialized to
; this 128-byte aligned area for local variables &
; spill slots
; CHECK-MACHO: sub x9, sp, #7, lsl #12
; CHECK-MACHO: and sp, x9, #0xffffffffffff8000
; CHECK-MACHO: mov x19, sp
; Check correct access to arguments passed on the stack, through frame pointer
; CHECK-MACHO: ldr w[[IARG:[0-9]+]], [x29, #20]
; CHECK-MACHO: ldr d[[DARG:[0-9]+]], [x29, #32]
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
; and set-up of base pointer (x19).
; CHECK-MACHO: mov w9, w0
; CHECK-MACHO: mov x10, sp
; CHECK-MACHO: lsl x9, x9, #2
; CHECK-MACHO: add x9, x9, #15
; CHECK-MACHO: and x9, x9, #0x7fffffff0
; CHECK-MACHO: sub x[[VLASPTMP:[0-9]+]], x10, x9
; CHECK-MACHO: mov sp, x[[VLASPTMP]]
; Check correct access to local variable, through base pointer
; CHECK-MACHO: ldr w[[ILOC:[0-9]+]], [x19]
; CHECK-MACHO: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
; Check epilogue:
; Check that stack pointer get restored from frame pointer.
; CHECK-MACHO: sub sp, x29, #16
; CHECK-MACHO: ldp x29, x30, [sp, #16]
; CHECK-MACHO: ldp x20, x19, [sp], #32
; CHECK-MACHO: ret
define void @realign_conditional(i1 %b) {
entry:
br i1 %b, label %bb0, label %bb1
bb0:
%MyAlloca = alloca i8, i64 64, align 32
br label %bb1
bb1:
ret void
}
; CHECK-LABEL: realign_conditional
; No realignment in the prologue.
; CHECK-NOT: and
; CHECK-NOT: 0xffffffffffffffe0
; CHECK: tbz {{.*}} .[[LABEL:.*]]
; Stack is realigned in a non-entry BB.
; CHECK: sub [[REG:x[01-9]+]], sp, #64
; CHECK: and sp, [[REG]], #0xffffffffffffffe0
; CHECK: .[[LABEL]]:
; CHECK: ret
define void @realign_conditional2(i1 %b) {
entry:
%tmp = alloca i8, i32 16
br i1 %b, label %bb0, label %bb1
bb0:
%MyAlloca = alloca i8, i64 64, align 32
br label %bb1
bb1:
ret void
}
; CHECK-LABEL: realign_conditional2
; Extra realignment in the prologue (performance issue).
; CHECK: tbz {{.*}} .[[LABEL:.*]]
; CHECK: sub x9, sp, #32 // =32
; CHECK: and sp, x9, #0xffffffffffffffe0
; CHECK: mov x19, sp
; Stack is realigned in a non-entry BB.
; CHECK: sub [[REG:x[01-9]+]], sp, #64
; CHECK: and sp, [[REG]], #0xffffffffffffffe0
; CHECK: .[[LABEL]]:
; CHECK: ret
attributes #0 = { "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!1 = !{!2, !2, i64 0}
!2 = !{!"int", !3, i64 0}
!3 = !{!"omnipotent char", !4, i64 0}
!4 = !{!"Simple C/C++ TBAA"}
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