| ; RUN: opt -S -hotcoldsplit -hotcoldsplit-threshold=0 < %s 2>&1 | FileCheck %s |
| |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) |
| |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) |
| |
| declare void @use(i8*) |
| |
| declare void @cold_use2(i8*, i8*) cold |
| |
| ; CHECK-LABEL: define {{.*}}@foo( |
| define void @foo() { |
| entry: |
| %local1 = alloca i256 |
| %local2 = alloca i256 |
| %local1_cast = bitcast i256* %local1 to i8* |
| %local2_cast = bitcast i256* %local2 to i8* |
| br i1 undef, label %normalPath, label %outlinedPath |
| |
| normalPath: |
| ; These two uses of stack slots are non-overlapping. Based on this alone, |
| ; the stack slots could be merged. |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* %local1_cast) |
| call void @use(i8* %local1_cast) |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* %local1_cast) |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* %local2_cast) |
| call void @use(i8* %local2_cast) |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* %local2_cast) |
| ret void |
| |
| ; CHECK-LABEL: codeRepl: |
| ; CHECK: [[local1_cast:%.*]] = bitcast i256* %local1 to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 -1, i8* [[local1_cast]]) |
| ; CHECK-NEXT: [[local2_cast:%.*]] = bitcast i256* %local2 to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 -1, i8* [[local2_cast]]) |
| ; CHECK-NEXT: call i1 @foo.cold.1(i8* %local1_cast, i8* %local2_cast) |
| ; CHECK-NEXT: br i1 |
| |
| outlinedPath: |
| ; These two uses of stack slots are overlapping. This should prevent |
| ; merging of stack slots. CodeExtractor must replicate the effects of |
| ; these markers in the caller to inhibit stack coloring. |
| %gep1 = getelementptr inbounds i8, i8* %local1_cast, i64 1 |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* %gep1) |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* %local2_cast) |
| call void @cold_use2(i8* %local1_cast, i8* %local2_cast) |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* %gep1) |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* %local2_cast) |
| br i1 undef, label %outlinedPath2, label %outlinedPathExit |
| |
| outlinedPath2: |
| ; These extra lifetime markers are used to test that we emit only one |
| ; pair of guard markers in the caller per memory object. |
| call void @llvm.lifetime.start.p0i8(i64 1, i8* %local2_cast) |
| call void @use(i8* %local2_cast) |
| call void @llvm.lifetime.end.p0i8(i64 1, i8* %local2_cast) |
| ret void |
| |
| outlinedPathExit: |
| ret void |
| } |
| |
| ; CHECK-LABEL: define {{.*}}@foo.cold.1( |
| ; CHECK-NOT: @llvm.lifetime |
