forked from OSchip/llvm-project
29 lines
755 B
LLVM
29 lines
755 B
LLVM
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; RUN: opt < %s -lcssa -S | FileCheck %s
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; RUN: opt < %s -passes=lcssa -S | FileCheck %s
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declare i1 @c1()
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declare i1 @c2()
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define i32 @foo() {
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; CHECK-LABEL: @foo
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entry:
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br label %loop_begin
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loop_begin: ; preds = %loop_body.2, %entry
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br i1 true, label %loop_body.1, label %loop_exit2
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loop_body.1: ; preds = %loop_begin
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%X.1 = add i32 0, 1 ; <i32> [#uses=1]
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%rel.1 = call i1 @c1( ) ; <i1> [#uses=1]
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br i1 %rel.1, label %loop_exit, label %loop_body.2
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loop_body.2: ; preds = %loop_body.1
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%rel.2 = call i1 @c2( ) ; <i1> [#uses=1]
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br i1 %rel.2, label %loop_exit, label %loop_begin
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loop_exit: ; preds = %loop_body.2, %loop_body.1
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; CHECK: %X.1.lcssa = phi
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ret i32 %X.1
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loop_exit2: ; preds = %loop_begin
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ret i32 1
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; CHECK-NOT: %X.1.lcssa1
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}
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