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5d787bb93e
types. These tests mimic the integer test cases in the normal InstCombine test suite but use "strange" integer bit widths. Most tests written by Zhou Sheng, a few by me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35284 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.6 KiB
LLVM
53 lines
1.6 KiB
LLVM
; This test makes sure that add instructions are properly eliminated.
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; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
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; RUN: llvm-as < %s | opt -instcombine -disable-output &&
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
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; RUN: grep -v OK | not grep add
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implementation
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define i1 @test1(i1 %x) {
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%tmp.2 = xor i1 %x, 1
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i1 %tmp.2, 1
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ret i1 %tmp.4
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}
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define i47 @test2(i47 %x) {
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%tmp.2 = xor i47 %x, 70368744177664
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i47 %tmp.2, 70368744177664
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ret i47 %tmp.4
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}
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define i15 @test3(i15 %x) {
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%tmp.2 = xor i15 %x, 16384
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i15 %tmp.2, 16384
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ret i15 %tmp.4
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}
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define i12 @test4(i12 %x) {
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;; If we have ADD(XOR(AND(X, 0xFF), 0xF..F80), 0x80), it's a sext.
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%X = and i12 %x, 63
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%tmp.2 = xor i12 %X, 4064 ; 0xFE0
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%tmp.4 = add i12 %tmp.2, 32 ; 0x020
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ret i12 %tmp.4
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}
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define i49 @test5(i49 %x) {
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;; If we have ADD(XOR(AND(X, 0xFF), 0x80), 0xF..F80), it's a sext.
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%X = and i49 %x, 16777215 ; 0x0000000ffffff
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%tmp.2 = xor i49 %X, 8388608 ; 0x0000000800000
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%tmp.4 = add i49 %tmp.2, -8388608 ; 0x1FFFFFF800000
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ret i49 %tmp.4
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}
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define i49 @test6(i49 %x) {
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;; (x & 254)+1 -> (x & 254)|1
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%tmp.2 = and i49 %x, 562949953421310
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%tmp.4 = add i49 %tmp.2, 1
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ret i49 %tmp.4
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}
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