65 lines
2.4 KiB
LLVM
65 lines
2.4 KiB
LLVM
|
; 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
|