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c138053109
When expanding a SETCC for which the low half is known to evaluate to false, we can only throw it away for LT/GT comparisons, not LE/GE. This fixes PR29170. Differential Revision: https://reviews.llvm.org/D24151 llvm-svn: 280424
33 lines
638 B
LLVM
33 lines
638 B
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386-unknown-linux-gnu"
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@b = global i16 0, align 4
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; CHECK-LABEL: @main
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; CHECK: cmpl
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; CHECK: sbbl
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define i32 @main() {
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entry:
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%true = icmp eq i32 0, 0
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%const = bitcast i64 -4294967296 to i64
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br i1 %true, label %go, label %if.else
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go:
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%b = load i16, i16* @b, align 4
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%sext = shl i16 %b, 8
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%conv = ashr i16 %sext, 8
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%neg4 = xor i64 %const, -1
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%conv5 = zext i16 %conv to i64
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%cmp = icmp slt i64 %conv5, %neg4
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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ret i32 42
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if.else:
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ret i32 0
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}
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