31 lines
1.0 KiB
LLVM
31 lines
1.0 KiB
LLVM
; RUN: opt < %s -lcssa -S | FileCheck %s
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; RUN: opt < %s -passes=lcssa -S | FileCheck %s
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; RUN: opt < %s -debugify -lcssa -S | FileCheck -check-prefix=DEBUGIFY %s
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define void @lcssa(i1 %S2) {
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; CHECK-LABEL: @lcssa
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entry:
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br label %loop.interior
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loop.interior: ; preds = %post.if, %entry
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br i1 %S2, label %if.true, label %if.false
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if.true: ; preds = %loop.interior
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%X1 = add i32 0, 0 ; <i32> [#uses=1]
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br label %post.if
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if.false: ; preds = %loop.interior
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%X2 = add i32 0, 1 ; <i32> [#uses=1]
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br label %post.if
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post.if: ; preds = %if.false, %if.true
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%X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ] ; <i32> [#uses=1]
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br i1 %S2, label %loop.exit, label %loop.interior
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loop.exit: ; preds = %post.if
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; CHECK: %X3.lcssa = phi i32
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; DEBUGIFY: %X3.lcssa = phi i32 {{.*}}, !dbg ![[DbgLoc:[0-9]+]]
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; DEBUGIFY-NEXT: call void @llvm.dbg.value(metadata i32 %X3.lcssa
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; CHECK: %X4 = add i32 3, %X3.lcssa
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%X4 = add i32 3, %X3 ; <i32> [#uses=0]
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ret void
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}
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; Make sure the lcssa phi has %X3's debug location
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; DEBUGIFY: ![[DbgLoc]] = !DILocation(line: 7
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