19 строки
485 B
LLVM
19 строки
485 B
LLVM
; RUN: opt %s -instcombine
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define i32 @f(i32 %theNumber) {
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entry:
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%cmp = icmp sgt i32 %theNumber, -1
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call void @llvm.assume(i1 %cmp)
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br i1 true, label %if.then, label %if.end
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if.then: ; preds = %entry
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%shl = shl nuw i32 %theNumber, 1
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%phi = phi i32 [ %shl, %if.then ], [ undef, %entry ]
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ret i32 %phi
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}
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declare void @llvm.assume(i1)
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