derek.holloway
7502bf64a4
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70 lines
1.5 KiB
LLVM
70 lines
1.5 KiB
LLVM
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
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; CHECK-LABEL: shift_undef_64
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define void @shift_undef_64(ptr %p) {
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%r1 = lshr i64 -1, 4294967296 ; 2^32
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; CHECK: store i64 poison
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store i64 %r1, ptr %p
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%r2 = ashr i64 -1, 4294967297 ; 2^32 + 1
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; CHECK: store i64 poison
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store i64 %r2, ptr %p
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%r3 = shl i64 -1, 4294967298 ; 2^32 + 2
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; CHECK: store i64 poison
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store i64 %r3, ptr %p
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ret void
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}
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; CHECK-LABEL: shift_undef_65
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define void @shift_undef_65(ptr %p) {
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%r1 = lshr i65 2, 18446744073709551617
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; CHECK: store i65 poison
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store i65 %r1, ptr %p
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%r2 = ashr i65 4, 18446744073709551617
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; CHECK: store i65 poison
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store i65 %r2, ptr %p
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%r3 = shl i65 1, 18446744073709551617
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; CHECK: store i65 poison
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store i65 %r3, ptr %p
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ret void
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}
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; CHECK-LABEL: shift_undef_256
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define void @shift_undef_256(ptr %p) {
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%r1 = lshr i256 2, 18446744073709551617
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; CHECK: store i256 poison
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store i256 %r1, ptr %p
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%r2 = ashr i256 4, 18446744073709551618
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; CHECK: store i256 poison
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store i256 %r2, ptr %p
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%r3 = shl i256 1, 18446744073709551619
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; CHECK: store i256 poison
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store i256 %r3, ptr %p
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ret void
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}
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; CHECK-LABEL: shift_undef_511
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define void @shift_undef_511(ptr %p) {
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%r1 = lshr i511 -1, 1208925819614629174706276 ; 2^80 + 100
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; CHECK: store i511 poison
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store i511 %r1, ptr %p
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%r2 = ashr i511 -2, 1208925819614629174706200
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; CHECK: store i511 poison
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store i511 %r2, ptr %p
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%r3 = shl i511 -3, 1208925819614629174706180
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; CHECK: store i511 poison
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store i511 %r3, ptr %p
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ret void
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}
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