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; RUN: opt -S -passes=hotcoldsplit -hotcoldsplit-threshold=0 < %s 2>&1 | FileCheck %s
declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
declare void @use(ptr)
declare void @cold_use2(ptr, ptr) cold
; CHECK-LABEL: define {{.*}}@foo(
define void @foo() {
entry:
%local1 = alloca i256
%local2 = alloca i256
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.p0(i64 1, ptr %local1)
call void @use(ptr %local1)
call void @llvm.lifetime.end.p0(i64 1, ptr %local1)
call void @llvm.lifetime.start.p0(i64 1, ptr %local2)
call void @use(ptr %local2)
call void @llvm.lifetime.end.p0(i64 1, ptr %local2)
ret void
; CHECK-LABEL: codeRepl:
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 -1, ptr %local1)
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 -1, ptr %local2)
; CHECK-NEXT: call i1 @foo.cold.1(ptr %local1, ptr %local2)
; 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, ptr %local1, i64 1
call void @llvm.lifetime.start.p0(i64 1, ptr %gep1)
call void @llvm.lifetime.start.p0(i64 1, ptr %local2)
call void @cold_use2(ptr %local1, ptr %local2)
call void @llvm.lifetime.end.p0(i64 1, ptr %gep1)
call void @llvm.lifetime.end.p0(i64 1, ptr %local2)
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.p0(i64 1, ptr %local2)
call void @use(ptr %local2)
call void @llvm.lifetime.end.p0(i64 1, ptr %local2)
ret void
outlinedPathExit:
ret void
}
; CHECK-LABEL: define {{.*}}@foo.cold.1(
; CHECK-NOT: @llvm.lifetime
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