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[AMDGPU][NFC] Skip processing intrinsics that do not become real instructions

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Reviewers: rampitec

Reviewed By: rampitec

Subscribers: arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81260
This commit is contained in:
dfukalov 2020-06-06 03:47:05 +03:00
parent e9de9e3368
commit 6a31a9a543
2 changed files with 27 additions and 1 deletions
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4
llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
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@ -1730,7 +1730,9 @@ bool AMDGPUSimplifyLibCalls::runOnFunction(Function &F) {
// Ignore non-calls.
CallInst *CI = dyn_cast<CallInst>(I);
++I;
if (!CI) continue;
// Ignore intrinsics that do not become real instructions.
if (!CI || isa<DbgInfoIntrinsic>(CI) || CI->isLifetimeStartOrEnd())
continue;
// Ignore indirect calls.
Function *Callee = CI->getCalledFunction();

24
llvm/test/CodeGen/AMDGPU/simplify-libcalls2.ll Normal file
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@ -0,0 +1,24 @@
; REQUIRES: asserts
; RUN: opt -S -amdgpu-simplifylib -debug-only=amdgpu-simplifylib -mtriple=amdgcn-unknown-amdhsa -disable-output < %s 2>&1 | FileCheck %s
; CHECK-NOT: AMDIC: try folding call void @llvm.lifetime.start.p0i8
; CHECK-NOT: AMDIC: try folding call void @llvm.lifetime.end.p0i8
; CHECK-NOT: AMDIC: try folding call void @llvm.dbg.value
define void @foo(i32 %i) {
call void @llvm.lifetime.start.p0i8(i64 1, i8* undef)
call void @llvm.lifetime.end.p0i8(i64 1, i8* undef)
call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(name: "1", scope: !2), metadata !DIExpression()), !dbg !3
ret void
}
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.module.flags = !{!1}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !DIFile(filename: "1", directory: "1"))
!1 = !{i32 2, !"Debug Info Version", i32 3}
!2 = distinct !DISubprogram(unit: !0)
!3 = !DILocation(line: 1, column: 1, scope: !2)