mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
790aec0651
Constant folding for shift IR instructions ignores all bits above 32 of second argument (shift amount). Because of that, some undef results are not recognized and APInt can raise an assert failure if second argument has more than 64 bits. Patch by Paweł Bylica! Differential Revision: http://reviews.llvm.org/D7701 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232176 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
1.5 KiB
LLVM
70 lines
1.5 KiB
LLVM
; RUN: opt < %s -constprop -S | FileCheck %s
|
|
|
|
; CHECK-LABEL: shift_undef_64
|
|
define void @shift_undef_64(i64* %p) {
|
|
%r1 = lshr i64 -1, 4294967296 ; 2^32
|
|
; CHECK: store i64 undef
|
|
store i64 %r1, i64* %p
|
|
|
|
%r2 = ashr i64 -1, 4294967297 ; 2^32 + 1
|
|
; CHECK: store i64 undef
|
|
store i64 %r2, i64* %p
|
|
|
|
%r3 = shl i64 -1, 4294967298 ; 2^32 + 2
|
|
; CHECK: store i64 undef
|
|
store i64 %r3, i64* %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_65
|
|
define void @shift_undef_65(i65* %p) {
|
|
%r1 = lshr i65 2, 18446744073709551617
|
|
; CHECK: store i65 undef
|
|
store i65 %r1, i65* %p
|
|
|
|
%r2 = ashr i65 4, 18446744073709551617
|
|
; CHECK: store i65 undef
|
|
store i65 %r2, i65* %p
|
|
|
|
%r3 = shl i65 1, 18446744073709551617
|
|
; CHECK: store i65 undef
|
|
store i65 %r3, i65* %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_256
|
|
define void @shift_undef_256(i256* %p) {
|
|
%r1 = lshr i256 2, 18446744073709551617
|
|
; CHECK: store i256 undef
|
|
store i256 %r1, i256* %p
|
|
|
|
%r2 = ashr i256 4, 18446744073709551618
|
|
; CHECK: store i256 undef
|
|
store i256 %r2, i256* %p
|
|
|
|
%r3 = shl i256 1, 18446744073709551619
|
|
; CHECK: store i256 undef
|
|
store i256 %r3, i256* %p
|
|
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: shift_undef_511
|
|
define void @shift_undef_511(i511* %p) {
|
|
%r1 = lshr i511 -1, 1208925819614629174706276 ; 2^80 + 100
|
|
; CHECK: store i511 undef
|
|
store i511 %r1, i511* %p
|
|
|
|
%r2 = ashr i511 -2, 1208925819614629174706200
|
|
; CHECK: store i511 undef
|
|
store i511 %r2, i511* %p
|
|
|
|
%r3 = shl i511 -3, 1208925819614629174706180
|
|
; CHECK: store i511 undef
|
|
store i511 %r3, i511* %p
|
|
|
|
ret void
|
|
}
|