04b944e230
The only interesting test change is in @PR31262, where the following fold is now performed, while it previously was not: https://alive2.llvm.org/ce/z/a5Qmr6 llvm/test/Transforms/InstSimplify/ConstProp/gep.ll has not been updated, because there is a tradeoff between folding and inrange preservation there that we may want to discuss. Updates have been performed using: https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34
70 lines
1.5 KiB
LLVM
70 lines
1.5 KiB
LLVM
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
|
|
|
|
; CHECK-LABEL: shift_undef_64
|
|
define void @shift_undef_64(ptr %p) {
|
|
%r1 = lshr i64 -1, 4294967296 ; 2^32
|
|
; CHECK: store i64 poison
|
|
store i64 %r1, ptr %p
|
|
|
|
%r2 = ashr i64 -1, 4294967297 ; 2^32 + 1
|
|
; CHECK: store i64 poison
|
|
store i64 %r2, ptr %p
|
|
|
|
%r3 = shl i64 -1, 4294967298 ; 2^32 + 2
|
|
; CHECK: store i64 poison
|
|
store i64 %r3, ptr %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_65
|
|
define void @shift_undef_65(ptr %p) {
|
|
%r1 = lshr i65 2, 18446744073709551617
|
|
; CHECK: store i65 poison
|
|
store i65 %r1, ptr %p
|
|
|
|
%r2 = ashr i65 4, 18446744073709551617
|
|
; CHECK: store i65 poison
|
|
store i65 %r2, ptr %p
|
|
|
|
%r3 = shl i65 1, 18446744073709551617
|
|
; CHECK: store i65 poison
|
|
store i65 %r3, ptr %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_256
|
|
define void @shift_undef_256(ptr %p) {
|
|
%r1 = lshr i256 2, 18446744073709551617
|
|
; CHECK: store i256 poison
|
|
store i256 %r1, ptr %p
|
|
|
|
%r2 = ashr i256 4, 18446744073709551618
|
|
; CHECK: store i256 poison
|
|
store i256 %r2, ptr %p
|
|
|
|
%r3 = shl i256 1, 18446744073709551619
|
|
; CHECK: store i256 poison
|
|
store i256 %r3, ptr %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_511
|
|
define void @shift_undef_511(ptr %p) {
|
|
%r1 = lshr i511 -1, 1208925819614629174706276 ; 2^80 + 100
|
|
; CHECK: store i511 poison
|
|
store i511 %r1, ptr %p
|
|
|
|
%r2 = ashr i511 -2, 1208925819614629174706200
|
|
; CHECK: store i511 poison
|
|
store i511 %r2, ptr %p
|
|
|
|
%r3 = shl i511 -3, 1208925819614629174706180
|
|
; CHECK: store i511 poison
|
|
store i511 %r3, ptr %p
|
|
|
|
ret void
|
|
}
|