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; RUN: opt -debugify -loop-simplify -loop-extract -S < %s | FileCheck %s
; This tests 2 cases:
; 1. loop1 should be extracted into a function, without extracting %v1 alloca.
; 2. loop2 should be extracted into a function, with the %v2 alloca.
;
; This used to produce an invalid IR, where `memcpy` will have a reference to
; the, now, external value (local to the extracted loop function).
; CHECK-LABEL: define void @test()
; CHECK-NEXT: entry:
; CHECK-NEXT: %v1 = alloca i32
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* %v1
; CHECK-NEXT: %p1 = bitcast i32* %v1 to i8*
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* %p1,
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
; CHECK-LABEL: define internal void @test.loop2()
; CHECK-NEXT: newFuncRoot:
; CHECK-NEXT: %v2 = alloca i32
; CHECK-NEXT: %p2 = bitcast i32* %v2 to i8*
; CHECK-LABEL: define internal void @test.loop1(i8* %p1)
; CHECK-NEXT: newFuncRoot:
; CHECK-NEXT: br
define void @test() {
entry:
%v1 = alloca i32, align 4
%v2 = alloca i32, align 4
%p1 = bitcast i32* %v1 to i8*
%p2 = bitcast i32* %v2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
br label %loop1
loop1:
call void @llvm.lifetime.start.p0i8(i64 4, i8* %p1)
%r1 = call i32 @foo(i8* %p1)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %p1)
%cmp1 = icmp ne i32 %r1, 0
br i1 %cmp1, label %loop1, label %loop2
loop2:
call void @llvm.lifetime.start.p0i8(i64 4, i8* %p2)
%r2 = call i32 @foo(i8* %p2)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %p2)
%cmp2 = icmp ne i32 %r2, 0
br i1 %cmp2, label %loop2, label %exit
exit:
ret void
}
declare i32 @foo(i8*)
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
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