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ee9a2e322a
(they had just been forgotten before). Adding Xor causes "main" in the existing testcase 2010-11-01-lshr-mask.ll to be hugely more simplified. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122245 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.1 KiB
LLVM
47 lines
1.1 KiB
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
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; <rdar://problem/8606771>
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; CHECK: @main
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define i32 @main(i32 %argc) nounwind ssp {
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entry:
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%tmp3151 = trunc i32 %argc to i8
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; CHECK: %tmp3162 = shl i8 %tmp3151, 5
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; CHECK: and i8 %tmp3162, 64
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; CHECK-NOT: shl
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; CHECK-NOT: shr
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%tmp3161 = or i8 %tmp3151, -17
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%tmp3162 = and i8 %tmp3151, 122
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%tmp3163 = xor i8 %tmp3162, -17
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%tmp4114 = shl i8 %tmp3163, 6
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%tmp4115 = xor i8 %tmp4114, %tmp3163
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%tmp4120 = xor i8 %tmp3161, %tmp4115
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%tmp4126 = lshr i8 %tmp4120, 7
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%tmp4127 = mul i8 %tmp4126, 64
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%tmp4086 = zext i8 %tmp4127 to i32
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; CHECK: ret i32
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ret i32 %tmp4086
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}
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; rdar://8739316
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; CHECK: @foo
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define i8 @foo(i8 %arg, i8 %arg1) nounwind {
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bb:
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%tmp = shl i8 %arg, 7
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%tmp2 = and i8 %arg1, 84
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%tmp3 = and i8 %arg1, -118
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%tmp4 = and i8 %arg1, 33
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%tmp5 = sub i8 -88, %tmp2
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%tmp6 = and i8 %tmp5, 84
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%tmp7 = or i8 %tmp4, %tmp6
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%tmp8 = xor i8 %tmp, %tmp3
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%tmp9 = or i8 %tmp7, %tmp8
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%tmp10 = lshr i8 %tmp8, 7
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%tmp11 = shl i8 %tmp10, 5
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; CHECK: %0 = lshr i8 %tmp8, 2
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; CHECK: %tmp11 = and i8 %0, 32
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%tmp12 = xor i8 %tmp11, %tmp9
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ret i8 %tmp12
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}
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