23 lines
650 B
LLVM
23 lines
650 B
LLVM
; RUN: opt -simplifycfg -S < %s | FileCheck %s
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declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1
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define i32 @f(i32 %a, i32 %b) #0 {
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entry:
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%uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b)
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%cmp = extractvalue { i32, i1 } %uadd, 1
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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%0 = extractvalue { i32, i1 } %uadd, 0
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br label %return
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return: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ]
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ret i32 %retval.0
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; CHECK-LABEL: @f(
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; CHECK-NOT: phi
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; CHECK: select
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}
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