f8045b250d
This includes a fix for cases where things get marked as overdefined in
ResolvedUndefsIn, but we later discover a constant. To avoid crashing,
we consistently bail out on overdefined values in the visitors. This is
similar to the previous behavior with forcedconstant.
This reverts the revert commit 02b72f564c.
91 lines
2.7 KiB
LLVM
91 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -sccp -S | FileCheck %s
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define void @shift_undef_64(i64* %p) {
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; CHECK-LABEL: @shift_undef_64(
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; CHECK-NEXT: [[R1:%.*]] = lshr i64 -1, 4294967296
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; CHECK-NEXT: store i64 [[R1]], i64* [[P:%.*]]
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; CHECK-NEXT: [[R2:%.*]] = ashr i64 -1, 4294967297
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; CHECK-NEXT: store i64 [[R2]], i64* [[P]]
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; CHECK-NEXT: [[R3:%.*]] = shl i64 -1, 4294967298
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; CHECK-NEXT: store i64 [[R3]], i64* [[P]]
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; CHECK-NEXT: ret void
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;
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%r1 = lshr i64 -1, 4294967296 ; 2^32
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store i64 %r1, i64* %p
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%r2 = ashr i64 -1, 4294967297 ; 2^32 + 1
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store i64 %r2, i64* %p
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%r3 = shl i64 -1, 4294967298 ; 2^32 + 2
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store i64 %r3, i64* %p
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ret void
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}
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define void @shift_undef_65(i65* %p) {
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; CHECK-LABEL: @shift_undef_65(
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; CHECK-NEXT: [[R1:%.*]] = lshr i65 2, -18446744073709551615
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; CHECK-NEXT: store i65 [[R1]], i65* [[P:%.*]]
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; CHECK-NEXT: [[R2:%.*]] = ashr i65 4, -18446744073709551615
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; CHECK-NEXT: store i65 [[R2]], i65* [[P]]
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; CHECK-NEXT: [[R3:%.*]] = shl i65 1, -18446744073709551615
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; CHECK-NEXT: store i65 [[R3]], i65* [[P]]
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; CHECK-NEXT: ret void
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;
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%r1 = lshr i65 2, 18446744073709551617
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store i65 %r1, i65* %p
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%r2 = ashr i65 4, 18446744073709551617
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store i65 %r2, i65* %p
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%r3 = shl i65 1, 18446744073709551617
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store i65 %r3, i65* %p
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ret void
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}
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define void @shift_undef_256(i256* %p) {
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; CHECK-LABEL: @shift_undef_256(
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; CHECK-NEXT: [[R1:%.*]] = lshr i256 2, 18446744073709551617
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; CHECK-NEXT: store i256 [[R1]], i256* [[P:%.*]]
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; CHECK-NEXT: [[R2:%.*]] = ashr i256 4, 18446744073709551618
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; CHECK-NEXT: store i256 [[R2]], i256* [[P]]
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; CHECK-NEXT: [[R3:%.*]] = shl i256 1, 18446744073709551619
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; CHECK-NEXT: store i256 [[R3]], i256* [[P]]
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; CHECK-NEXT: ret void
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;
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%r1 = lshr i256 2, 18446744073709551617
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store i256 %r1, i256* %p
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%r2 = ashr i256 4, 18446744073709551618
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store i256 %r2, i256* %p
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%r3 = shl i256 1, 18446744073709551619
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store i256 %r3, i256* %p
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ret void
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}
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define void @shift_undef_511(i511* %p) {
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; CHECK-LABEL: @shift_undef_511(
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; CHECK-NEXT: [[R1:%.*]] = lshr i511 -1, 1208925819614629174706276
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; CHECK-NEXT: store i511 [[R1]], i511* [[P:%.*]]
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; CHECK-NEXT: [[R2:%.*]] = ashr i511 -2, 1208925819614629174706200
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; CHECK-NEXT: store i511 [[R2]], i511* [[P]]
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; CHECK-NEXT: [[R3:%.*]] = shl i511 -3, 1208925819614629174706180
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; CHECK-NEXT: store i511 [[R3]], i511* [[P]]
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; CHECK-NEXT: ret void
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;
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%r1 = lshr i511 -1, 1208925819614629174706276 ; 2^80 + 100
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store i511 %r1, i511* %p
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%r2 = ashr i511 -2, 1208925819614629174706200
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store i511 %r2, i511* %p
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%r3 = shl i511 -3, 1208925819614629174706180
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store i511 %r3, i511* %p
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ret void
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}
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