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[ARM] Set Defs = [CPSR] for COPY_STRUCT_BYVAL, as it clobbers CPSR.

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Fixes PR35023.

Reviewers: MatzeB, t.p.northover, sunfish, qcolombet, efriedma

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D55909

llvm-svn: 349935
This commit is contained in:
Florian Hahn 2018-12-21 18:07:10 +00:00
parent 86547faf61
commit 33f5bfd4ee
2 changed files with 62 additions and 1 deletions
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2
lib/Target/ARM/ARMInstrInfo.td
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@ -4908,7 +4908,7 @@ let usesCustomInserter = 1, Defs = [CPSR] in {
def ABS : ARMPseudoInst<(outs GPR:$dst), (ins GPR:$src), 8, NoItinerary, []>;
}
let usesCustomInserter = 1 in {
let usesCustomInserter = 1, Defs = [CPSR] in {
def COPY_STRUCT_BYVAL_I32 : PseudoInst<
(outs), (ins GPR:$dst, GPR:$src, i32imm:$size, i32imm:$alignment),
NoItinerary,

61
test/CodeGen/ARM/copy-by-struct-i32.ll Normal file
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@ -0,0 +1,61 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=armv7-unknown-linux < %s -stop-before=expand-isel-pseudos | FileCheck --check-prefix=BEFORE-EXPAND %s
; RUN: llc -mtriple=armv7-unknown-linux < %s | FileCheck --check-prefix=ASSEMBLY %s
; Check COPY_STRUCT_BYVAL_I32 has CPSR as operand.
; BEFORE-EXPAND: COPY_STRUCT_BYVAL_I32 {{.*}} implicit-def dead $cpsr
; BEFORE-EXPAND: COPY_STRUCT_BYVAL_I32 {{.*}} implicit-def dead $cpsr
%struct.anon = type { i32, i32, i32, i32, i32, i32, i32, %struct.f, i32, i64, i32 }
%struct.f = type { i32, i32, i32, i32, i32 }
define arm_aapcscc void @s(i64* %q, %struct.anon* %p) {
; ASSEMBLY-LABEL: s:
; ASSEMBLY: @ %bb.0: @ %entry
; ASSEMBLY-NEXT: push {r4, r5, r11, lr}
; ASSEMBLY-NEXT: sub sp, sp, #136
; ASSEMBLY-NEXT: ldrd r4, r5, [r0]
; ASSEMBLY-NEXT: add lr, sp, #56
; ASSEMBLY-NEXT: ldm r1, {r0, r12}
; ASSEMBLY-NEXT: subs r4, r4, #1
; ASSEMBLY-NEXT: sbc r5, r5, #0
; ASSEMBLY-NEXT: ldr r2, [r1, #8]
; ASSEMBLY-NEXT: ldr r3, [r1, #12]
; ASSEMBLY-NEXT: str r5, [sp, #132]
; ASSEMBLY-NEXT: add r5, r1, #16
; ASSEMBLY-NEXT: str r4, [sp, #128]
; ASSEMBLY-NEXT: mov r4, sp
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: vld1.32 {d16}, [r5]!
; ASSEMBLY-NEXT: vst1.32 {d16}, [r4]!
; ASSEMBLY-NEXT: movw r4, #72
; ASSEMBLY-NEXT: .LBB0_1: @ %entry
; ASSEMBLY-NEXT: @ =>This Inner Loop Header: Depth=1
; ASSEMBLY-NEXT: vld1.32 {d16}, [r1]!
; ASSEMBLY-NEXT: subs r4, r4, #8
; ASSEMBLY-NEXT: vst1.32 {d16}, [lr]!
; ASSEMBLY-NEXT: bne .LBB0_1
; ASSEMBLY-NEXT: @ %bb.2: @ %entry
; ASSEMBLY-NEXT: mov r1, r12
; ASSEMBLY-NEXT: bl r
; ASSEMBLY-NEXT: add sp, sp, #136
; ASSEMBLY-NEXT: pop {r4, r5, r11, pc}
entry:
%0 = load i64, i64* %q, align 8
%sub = add nsw i64 %0, -1
tail call arm_aapcscc void bitcast (void (...)* @r to void (%struct.anon*, %struct.anon*, i64)*)(%struct.anon* byval nonnull align 8 %p, %struct.anon* byval nonnull align 8 %p, i64 %sub)
ret void
}
declare arm_aapcscc void @r(...)