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bea7c851cf
check the range of the constant when optimizing a comparison between a constant and a sign_extend_inreg node. llvm-svn: 109854
15 lines
459 B
LLVM
15 lines
459 B
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
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define i32 @extend2bit_v2(i32 %val) {
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entry:
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%0 = trunc i32 %val to i2 ; <i2> [#uses=1]
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%1 = sext i2 %0 to i32 ; <i32> [#uses=1]
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%2 = icmp eq i32 %1, 3 ; <i1> [#uses=1]
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%3 = zext i1 %2 to i32 ; <i32> [#uses=1]
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ret i32 %3
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}
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; CHECK: extend2bit_v2:
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; CHECK: xorl %eax, %eax
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; CHECK-NEXT: ret
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