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a0141b90a3
(X << 31) <s 0 --> (X&1) != 0 This happens dozens of times in the CFE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39879 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
592 B
LLVM
31 lines
592 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
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; RUN: egrep {shl|lshr|ashr} | wc -l | grep 3
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define i32 @test0(i32 %A, i32 %B, i32 %C) {
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%X = shl i32 %A, %C
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%Y = shl i32 %B, %C
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%Z = and i32 %X, %Y
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ret i32 %Z
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}
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define i32 @test1(i32 %A, i32 %B, i32 %C) {
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%X = lshr i32 %A, %C
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%Y = lshr i32 %B, %C
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%Z = or i32 %X, %Y
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ret i32 %Z
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}
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define i32 @test2(i32 %A, i32 %B, i32 %C) {
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%X = ashr i32 %A, %C
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%Y = ashr i32 %B, %C
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%Z = xor i32 %X, %Y
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ret i32 %Z
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}
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define i1 @test3(i32 %X) {
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%tmp1 = shl i32 %X, 7
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%tmp2 = icmp slt i32 %tmp1, 0
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ret i1 %tmp2
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}
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