a105877646
The idea behind this canonicalization is that it allows us to handle less patterns, because we know that some will be canonicalized away. This is indeed very useful to e.g. know that constants are always on the right. However, this is only useful if the canonicalization is actually reliable. This is the case for constants, but not for arguments: Moving these to the right makes it look like the "more complex" expression is guaranteed to be on the left, but this is not actually the case in practice. It fails as soon as you replace the argument with another instruction. The end result is that it looks like things correctly work in tests, while they actually don't. We use the "thwart complexity-based canonicalization" trick to handle this in tests, but it's often a challenge for new contributors to get this right, and based on the regressions this PR originally exposed, we clearly don't get this right in many cases. For this reason, I think that it's better to remove this complexity canonicalization. It will make it much easier to write tests for commuted cases and make sure that they are handled.
549 lines
18 KiB
LLVM
549 lines
18 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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declare void @use(i64)
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define i8 @shl_and(i8 %x, i8 %y) {
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; CHECK-LABEL: @shl_and(
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; CHECK-NEXT: [[TMP1:%.*]] = shl i8 [[X:%.*]], 5
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; CHECK-NEXT: [[TMP2:%.*]] = shl i8 [[Y:%.*]], 2
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; CHECK-NEXT: [[SH1:%.*]] = and i8 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret i8 [[SH1]]
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;
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%sh0 = shl i8 %x, 3
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%r = and i8 %sh0, %y
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%sh1 = shl i8 %r, 2
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ret i8 %sh1
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}
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define <2 x i8> @shl_and_nonuniform(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @shl_and_nonuniform(
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; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i8> [[X:%.*]], <i8 5, i8 4>
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; CHECK-NEXT: [[TMP2:%.*]] = shl <2 x i8> [[Y:%.*]], <i8 2, i8 0>
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; CHECK-NEXT: [[SH1:%.*]] = and <2 x i8> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <2 x i8> [[SH1]]
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;
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%sh0 = shl <2 x i8> %x, <i8 3, i8 4>
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%r = and <2 x i8> %sh0, %y
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%sh1 = shl <2 x i8> %r, <i8 2, i8 0>
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ret <2 x i8> %sh1
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}
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define i16 @shl_or(i16 %x, i16 %py) {
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; CHECK-LABEL: @shl_or(
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; CHECK-NEXT: [[Y:%.*]] = srem i16 [[PY:%.*]], 42
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; CHECK-NEXT: [[TMP1:%.*]] = shl i16 [[X:%.*]], 12
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; CHECK-NEXT: [[TMP2:%.*]] = shl nsw i16 [[Y]], 7
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; CHECK-NEXT: [[SH1:%.*]] = or i16 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret i16 [[SH1]]
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;
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%y = srem i16 %py, 42 ; thwart complexity-based canonicalization
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%sh0 = shl i16 %x, 5
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%r = or i16 %y, %sh0
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%sh1 = shl i16 %r, 7
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ret i16 %sh1
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}
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define <2 x i16> @shl_or_poison(<2 x i16> %x, <2 x i16> %py) {
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; CHECK-LABEL: @shl_or_poison(
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; CHECK-NEXT: [[Y:%.*]] = srem <2 x i16> [[PY:%.*]], <i16 42, i16 42>
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; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i16> [[X:%.*]], <i16 12, i16 poison>
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; CHECK-NEXT: [[TMP2:%.*]] = shl nsw <2 x i16> [[Y]], <i16 7, i16 poison>
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; CHECK-NEXT: [[SH1:%.*]] = or <2 x i16> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <2 x i16> [[SH1]]
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;
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%y = srem <2 x i16> %py, <i16 42, i16 42> ; thwart complexity-based canonicalization
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%sh0 = shl <2 x i16> %x, <i16 5, i16 poison>
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%r = or <2 x i16> %y, %sh0
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%sh1 = shl <2 x i16> %r, <i16 7, i16 poison>
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ret <2 x i16> %sh1
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}
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define i32 @shl_xor(i32 %x, i32 %y) {
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; CHECK-LABEL: @shl_xor(
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; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 12
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; CHECK-NEXT: [[TMP2:%.*]] = shl i32 [[Y:%.*]], 7
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; CHECK-NEXT: [[SH1:%.*]] = xor i32 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret i32 [[SH1]]
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;
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%sh0 = shl i32 %x, 5
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%r = xor i32 %sh0, %y
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%sh1 = shl i32 %r, 7
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ret i32 %sh1
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}
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define <2 x i32> @shl_xor_nonuniform(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @shl_xor_nonuniform(
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; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i32> [[X:%.*]], <i32 12, i32 14>
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; CHECK-NEXT: [[TMP2:%.*]] = shl <2 x i32> [[Y:%.*]], <i32 7, i32 8>
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; CHECK-NEXT: [[SH1:%.*]] = xor <2 x i32> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <2 x i32> [[SH1]]
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;
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%sh0 = shl <2 x i32> %x, <i32 5, i32 6>
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%r = xor <2 x i32> %sh0, %y
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%sh1 = shl <2 x i32> %r, <i32 7, i32 8>
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ret <2 x i32> %sh1
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}
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define i64 @lshr_and(i64 %x, i64 %py) {
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; CHECK-LABEL: @lshr_and(
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; CHECK-NEXT: [[Y:%.*]] = srem i64 [[PY:%.*]], 42
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; CHECK-NEXT: [[TMP1:%.*]] = lshr i64 [[X:%.*]], 12
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; CHECK-NEXT: [[TMP2:%.*]] = lshr i64 [[Y]], 7
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; CHECK-NEXT: [[SH1:%.*]] = and i64 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret i64 [[SH1]]
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;
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%y = srem i64 %py, 42 ; thwart complexity-based canonicalization
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%sh0 = lshr i64 %x, 5
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%r = and i64 %y, %sh0
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%sh1 = lshr i64 %r, 7
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ret i64 %sh1
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}
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define <2 x i64> @lshr_and_poison(<2 x i64> %x, <2 x i64> %py) {
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; CHECK-LABEL: @lshr_and_poison(
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; CHECK-NEXT: [[Y:%.*]] = srem <2 x i64> [[PY:%.*]], <i64 42, i64 42>
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; CHECK-NEXT: [[TMP1:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 12, i64 poison>
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; CHECK-NEXT: [[TMP2:%.*]] = lshr <2 x i64> [[Y]], <i64 7, i64 poison>
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; CHECK-NEXT: [[SH1:%.*]] = and <2 x i64> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <2 x i64> [[SH1]]
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;
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%y = srem <2 x i64> %py, <i64 42, i64 42> ; thwart complexity-based canonicalization
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%sh0 = lshr <2 x i64> %x, <i64 5, i64 poison>
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%r = and <2 x i64> %y, %sh0
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%sh1 = lshr <2 x i64> %r, <i64 7, i64 poison>
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ret <2 x i64> %sh1
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}
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define <4 x i32> @lshr_or(<4 x i32> %x, <4 x i32> %y) {
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; CHECK-LABEL: @lshr_or(
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; CHECK-NEXT: [[TMP1:%.*]] = lshr <4 x i32> [[X:%.*]], <i32 12, i32 12, i32 12, i32 12>
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; CHECK-NEXT: [[TMP2:%.*]] = lshr <4 x i32> [[Y:%.*]], <i32 7, i32 7, i32 7, i32 7>
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; CHECK-NEXT: [[SH1:%.*]] = or <4 x i32> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <4 x i32> [[SH1]]
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;
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%sh0 = lshr <4 x i32> %x, <i32 5, i32 5, i32 5, i32 5>
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%r = or <4 x i32> %sh0, %y
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%sh1 = lshr <4 x i32> %r, <i32 7, i32 7, i32 7, i32 7>
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ret <4 x i32> %sh1
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}
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define <8 x i16> @lshr_xor(<8 x i16> %x, <8 x i16> %py) {
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; CHECK-LABEL: @lshr_xor(
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; CHECK-NEXT: [[Y:%.*]] = srem <8 x i16> [[PY:%.*]], <i16 42, i16 42, i16 42, i16 42, i16 42, i16 42, i16 42, i16 42>
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; CHECK-NEXT: [[TMP1:%.*]] = lshr <8 x i16> [[X:%.*]], <i16 12, i16 12, i16 12, i16 12, i16 12, i16 12, i16 12, i16 12>
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; CHECK-NEXT: [[TMP2:%.*]] = lshr <8 x i16> [[Y]], <i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7>
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; CHECK-NEXT: [[SH1:%.*]] = xor <8 x i16> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <8 x i16> [[SH1]]
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;
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%y = srem <8 x i16> %py, <i16 42, i16 42, i16 42, i16 42, i16 42, i16 42, i16 42, i16 -42> ; thwart complexity-based canonicalization
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%sh0 = lshr <8 x i16> %x, <i16 5, i16 5, i16 5, i16 5, i16 5, i16 5, i16 5, i16 5>
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%r = xor <8 x i16> %y, %sh0
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%sh1 = lshr <8 x i16> %r, <i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7>
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ret <8 x i16> %sh1
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}
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define <16 x i8> @ashr_and(<16 x i8> %x, <16 x i8> %py, <16 x i8> %pz) {
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; CHECK-LABEL: @ashr_and(
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; CHECK-NEXT: [[Y:%.*]] = srem <16 x i8> [[PY:%.*]], [[PZ:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = ashr <16 x i8> [[X:%.*]], <i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5>
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; CHECK-NEXT: [[TMP2:%.*]] = ashr <16 x i8> [[Y]], <i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2>
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; CHECK-NEXT: [[SH1:%.*]] = and <16 x i8> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <16 x i8> [[SH1]]
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;
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%y = srem <16 x i8> %py, %pz ; thwart complexity-based canonicalization
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%sh0 = ashr <16 x i8> %x, <i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3>
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%r = and <16 x i8> %y, %sh0
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%sh1 = ashr <16 x i8> %r, <i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2, i8 2>
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ret <16 x i8> %sh1
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}
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define <2 x i64> @ashr_or(<2 x i64> %x, <2 x i64> %y) {
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; CHECK-LABEL: @ashr_or(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr <2 x i64> [[X:%.*]], <i64 12, i64 12>
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; CHECK-NEXT: [[TMP2:%.*]] = ashr <2 x i64> [[Y:%.*]], <i64 7, i64 7>
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; CHECK-NEXT: [[SH1:%.*]] = or <2 x i64> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <2 x i64> [[SH1]]
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;
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%sh0 = ashr <2 x i64> %x, <i64 5, i64 5>
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%r = or <2 x i64> %sh0, %y
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%sh1 = ashr <2 x i64> %r, <i64 7, i64 7>
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ret <2 x i64> %sh1
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}
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define i32 @ashr_xor(i32 %x, i32 %py) {
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; CHECK-LABEL: @ashr_xor(
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; CHECK-NEXT: [[Y:%.*]] = srem i32 [[PY:%.*]], 42
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 12
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; CHECK-NEXT: [[TMP2:%.*]] = ashr i32 [[Y]], 7
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; CHECK-NEXT: [[SH1:%.*]] = xor i32 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret i32 [[SH1]]
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;
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%y = srem i32 %py, 42 ; thwart complexity-based canonicalization
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%sh0 = ashr i32 %x, 5
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%r = xor i32 %y, %sh0
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%sh1 = ashr i32 %r, 7
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ret i32 %sh1
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}
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define i32 @shr_mismatch_xor(i32 %x, i32 %y) {
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; CHECK-LABEL: @shr_mismatch_xor(
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; CHECK-NEXT: [[SH0:%.*]] = ashr i32 [[X:%.*]], 5
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; CHECK-NEXT: [[R:%.*]] = xor i32 [[Y:%.*]], [[SH0]]
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; CHECK-NEXT: [[SH1:%.*]] = lshr i32 [[R]], 7
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; CHECK-NEXT: ret i32 [[SH1]]
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;
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%sh0 = ashr i32 %x, 5
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%r = xor i32 %y, %sh0
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%sh1 = lshr i32 %r, 7
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ret i32 %sh1
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}
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define i32 @ashr_overshift_xor(i32 %x, i32 %y) {
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; CHECK-LABEL: @ashr_overshift_xor(
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; CHECK-NEXT: [[SH0:%.*]] = ashr i32 [[X:%.*]], 15
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; CHECK-NEXT: [[R:%.*]] = xor i32 [[Y:%.*]], [[SH0]]
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; CHECK-NEXT: [[SH1:%.*]] = ashr i32 [[R]], 17
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; CHECK-NEXT: ret i32 [[SH1]]
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;
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%sh0 = ashr i32 %x, 15
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%r = xor i32 %y, %sh0
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%sh1 = ashr i32 %r, 17
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ret i32 %sh1
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}
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define <2 x i32> @ashr_poison_poison_xor(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @ashr_poison_poison_xor(
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; CHECK-NEXT: [[SH0:%.*]] = ashr <2 x i32> [[X:%.*]], <i32 15, i32 poison>
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; CHECK-NEXT: [[R:%.*]] = xor <2 x i32> [[Y:%.*]], [[SH0]]
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; CHECK-NEXT: [[SH1:%.*]] = ashr <2 x i32> [[R]], <i32 poison, i32 17>
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; CHECK-NEXT: ret <2 x i32> [[SH1]]
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;
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%sh0 = ashr <2 x i32> %x, <i32 15, i32 poison>
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%r = xor <2 x i32> %y, %sh0
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%sh1 = ashr <2 x i32> %r, <i32 poison, i32 17>
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ret <2 x i32> %sh1
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}
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define i32 @lshr_or_extra_use(i32 %x, i32 %y, ptr %p) {
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; CHECK-LABEL: @lshr_or_extra_use(
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; CHECK-NEXT: [[SH0:%.*]] = lshr i32 [[X:%.*]], 5
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; CHECK-NEXT: [[R:%.*]] = or i32 [[SH0]], [[Y:%.*]]
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; CHECK-NEXT: store i32 [[R]], ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[SH1:%.*]] = lshr i32 [[R]], 7
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; CHECK-NEXT: ret i32 [[SH1]]
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;
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%sh0 = lshr i32 %x, 5
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%r = or i32 %sh0, %y
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store i32 %r, ptr %p
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%sh1 = lshr i32 %r, 7
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ret i32 %sh1
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}
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; Avoid crashing on constant expressions.
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@g = external global i32
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define i32 @PR44028(i32 %x) {
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; CHECK-LABEL: @PR44028(
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; CHECK-NEXT: [[SH1:%.*]] = ashr exact i32 [[X:%.*]], 16
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; CHECK-NEXT: [[SH2:%.*]] = shl i32 ptrtoint (ptr @g to i32), 16
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; CHECK-NEXT: [[T0:%.*]] = xor i32 [[SH1]], [[SH2]]
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; CHECK-NEXT: [[T27:%.*]] = ashr exact i32 [[T0]], 16
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; CHECK-NEXT: ret i32 [[T27]]
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;
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%sh1 = ashr exact i32 %x, 16
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%sh2 = shl i32 ptrtoint (ptr @g to i32), 16
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%t0 = xor i32 %sh1, %sh2
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%t27 = ashr exact i32 %t0, 16
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ret i32 %t27
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}
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define i64 @lshr_mul(i64 %0) {
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; CHECK-LABEL: @lshr_mul(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nuw nsw i64 [[TMP0:%.*]], 13
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; CHECK-NEXT: ret i64 [[TMP2]]
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;
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%2 = mul nuw i64 %0, 52
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%3 = lshr i64 %2, 2
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ret i64 %3
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}
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define i64 @lshr_mul_nuw_nsw(i64 %0) {
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; CHECK-LABEL: @lshr_mul_nuw_nsw(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nuw nsw i64 [[TMP0:%.*]], 13
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; CHECK-NEXT: ret i64 [[TMP2]]
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;
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%2 = mul nuw nsw i64 %0, 52
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%3 = lshr i64 %2, 2
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ret i64 %3
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}
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define <4 x i32> @lshr_mul_vector(<4 x i32> %0) {
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; CHECK-LABEL: @lshr_mul_vector(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nuw nsw <4 x i32> [[TMP0:%.*]], <i32 13, i32 13, i32 13, i32 13>
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; CHECK-NEXT: ret <4 x i32> [[TMP2]]
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;
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%2 = mul nuw <4 x i32> %0, <i32 52, i32 52, i32 52, i32 52>
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%3 = lshr <4 x i32> %2, <i32 2, i32 2, i32 2, i32 2>
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ret <4 x i32> %3
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}
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define i64 @lshr_mul_negative_noexact(i64 %0) {
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; CHECK-LABEL: @lshr_mul_negative_noexact(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nuw i64 [[TMP0:%.*]], 53
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; CHECK-NEXT: [[TMP3:%.*]] = lshr i64 [[TMP2]], 2
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; CHECK-NEXT: ret i64 [[TMP3]]
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;
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%2 = mul nuw i64 %0, 53
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%3 = lshr i64 %2, 2
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ret i64 %3
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}
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define i64 @lshr_mul_negative_oneuse(i64 %0) {
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; CHECK-LABEL: @lshr_mul_negative_oneuse(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nuw i64 [[TMP0:%.*]], 52
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; CHECK-NEXT: call void @use(i64 [[TMP2]])
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; CHECK-NEXT: [[TMP3:%.*]] = lshr exact i64 [[TMP2]], 2
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; CHECK-NEXT: ret i64 [[TMP3]]
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;
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%2 = mul nuw i64 %0, 52
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call void @use(i64 %2)
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%3 = lshr i64 %2, 2
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ret i64 %3
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}
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define i64 @lshr_mul_negative_nonuw(i64 %0) {
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; CHECK-LABEL: @lshr_mul_negative_nonuw(
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; CHECK-NEXT: [[TMP2:%.*]] = mul i64 [[TMP0:%.*]], 52
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; CHECK-NEXT: [[TMP3:%.*]] = lshr exact i64 [[TMP2]], 2
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; CHECK-NEXT: ret i64 [[TMP3]]
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;
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%2 = mul i64 %0, 52
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%3 = lshr i64 %2, 2
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ret i64 %3
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}
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define i64 @lshr_mul_negative_nsw(i64 %0) {
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; CHECK-LABEL: @lshr_mul_negative_nsw(
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; CHECK-NEXT: [[TMP2:%.*]] = mul nsw i64 [[TMP0:%.*]], 52
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; CHECK-NEXT: [[TMP3:%.*]] = lshr exact i64 [[TMP2]], 2
|
|
; CHECK-NEXT: ret i64 [[TMP3]]
|
|
;
|
|
%2 = mul nsw i64 %0, 52
|
|
%3 = lshr i64 %2, 2
|
|
ret i64 %3
|
|
}
|
|
|
|
define i8 @shl_add(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @shl_add(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl i8 [[X:%.*]], 5
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl i8 [[Y:%.*]], 2
|
|
; CHECK-NEXT: [[SH1:%.*]] = add i8 [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = shl i8 %x, 3
|
|
%r = add i8 %sh0, %y
|
|
%sh1 = shl i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define i8 @shl_add_multiuse(i8 %x) {
|
|
; CHECK-LABEL: @shl_add_multiuse(
|
|
; CHECK-NEXT: [[SH0:%.*]] = shl i8 [[X:%.*]], 3
|
|
; CHECK-NEXT: call void @use(i8 [[SH0]])
|
|
; CHECK-NEXT: [[R:%.*]] = shl i8 [[X]], 5
|
|
; CHECK-NEXT: [[SH1:%.*]] = add i8 [[R]], 88
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = shl i8 %x, 3
|
|
%r = add i8 %sh0, -42
|
|
call void @use(i8 %sh0)
|
|
%sh1 = shl i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define i8 @shl_add_multiuse_nonconstant(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @shl_add_multiuse_nonconstant(
|
|
; CHECK-NEXT: [[SH0:%.*]] = shl i8 [[X:%.*]], 3
|
|
; CHECK-NEXT: [[R:%.*]] = add i8 [[SH0]], [[Y:%.*]]
|
|
; CHECK-NEXT: call void @use(i8 [[SH0]])
|
|
; CHECK-NEXT: [[SH1:%.*]] = shl i8 [[R]], 2
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = shl i8 %x, 3
|
|
%r = add i8 %sh0, %y
|
|
call void @use(i8 %sh0)
|
|
%sh1 = shl i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define <2 x i8> @shl_add_nonuniform(<2 x i8> %x, <2 x i8> %y) {
|
|
; CHECK-LABEL: @shl_add_nonuniform(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i8> [[X:%.*]], <i8 5, i8 4>
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl <2 x i8> [[Y:%.*]], <i8 2, i8 0>
|
|
; CHECK-NEXT: [[SH1:%.*]] = add <2 x i8> [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret <2 x i8> [[SH1]]
|
|
;
|
|
%sh0 = shl <2 x i8> %x, <i8 3, i8 4>
|
|
%r = add <2 x i8> %sh0, %y
|
|
%sh1 = shl <2 x i8> %r, <i8 2, i8 0>
|
|
ret <2 x i8> %sh1
|
|
}
|
|
|
|
|
|
define <2 x i64> @shl_add_poison(<2 x i64> %x, <2 x i64> %py) {
|
|
; CHECK-LABEL: @shl_add_poison(
|
|
; CHECK-NEXT: [[Y:%.*]] = srem <2 x i64> [[PY:%.*]], <i64 42, i64 42>
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i64> [[X:%.*]], <i64 12, i64 poison>
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl nsw <2 x i64> [[Y]], <i64 7, i64 poison>
|
|
; CHECK-NEXT: [[SH1:%.*]] = add <2 x i64> [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret <2 x i64> [[SH1]]
|
|
;
|
|
%y = srem <2 x i64> %py, <i64 42, i64 42> ; thwart complexity-based canonicalization
|
|
%sh0 = shl <2 x i64> %x, <i64 5, i64 poison>
|
|
%r = add <2 x i64> %y, %sh0
|
|
%sh1 = shl <2 x i64> %r, <i64 7, i64 poison>
|
|
ret <2 x i64> %sh1
|
|
}
|
|
|
|
|
|
define i8 @lshr_add(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @lshr_add(
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr i8 [[X:%.*]], 3
|
|
; CHECK-NEXT: [[R:%.*]] = add i8 [[SH0]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr i8 [[R]], 2
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = lshr i8 %x, 3
|
|
%r = add i8 %sh0, %y
|
|
%sh1 = lshr i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define <2 x i8> @lshr_add_nonuniform(<2 x i8> %x, <2 x i8> %y) {
|
|
; CHECK-LABEL: @lshr_add_nonuniform(
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 3, i8 4>
|
|
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[SH0]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i8> [[R]], <i8 2, i8 0>
|
|
; CHECK-NEXT: ret <2 x i8> [[SH1]]
|
|
;
|
|
%sh0 = lshr <2 x i8> %x, <i8 3, i8 4>
|
|
%r = add <2 x i8> %sh0, %y
|
|
%sh1 = lshr <2 x i8> %r, <i8 2, i8 0>
|
|
ret <2 x i8> %sh1
|
|
}
|
|
|
|
define <2 x i64> @lshr_add_poison(<2 x i64> %x, <2 x i64> %py) {
|
|
; CHECK-LABEL: @lshr_add_poison(
|
|
; CHECK-NEXT: [[Y:%.*]] = srem <2 x i64> [[PY:%.*]], <i64 42, i64 42>
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 5, i64 poison>
|
|
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i64> [[Y]], [[SH0]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i64> [[R]], <i64 7, i64 poison>
|
|
; CHECK-NEXT: ret <2 x i64> [[SH1]]
|
|
;
|
|
%y = srem <2 x i64> %py, <i64 42, i64 42> ; thwart complexity-based canonicalization
|
|
%sh0 = lshr <2 x i64> %x, <i64 5, i64 poison>
|
|
%r = add <2 x i64> %y, %sh0
|
|
%sh1 = lshr <2 x i64> %r, <i64 7, i64 poison>
|
|
ret <2 x i64> %sh1
|
|
}
|
|
|
|
define i8 @shl_sub(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @shl_sub(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl i8 [[X:%.*]], 5
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl i8 [[Y:%.*]], 2
|
|
; CHECK-NEXT: [[SH1:%.*]] = sub i8 [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = shl i8 %x, 3
|
|
%r = sub i8 %sh0, %y
|
|
%sh1 = shl i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
; Make sure we don't commute operands for sub
|
|
define i8 @shl_sub_no_commute(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @shl_sub_no_commute(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl i8 [[Y:%.*]], 5
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl i8 [[X:%.*]], 2
|
|
; CHECK-NEXT: [[SH1:%.*]] = sub i8 [[TMP2]], [[TMP1]]
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = shl i8 %y, 3
|
|
%r = sub i8 %x, %sh0
|
|
%sh1 = shl i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define <2 x i8> @shl_sub_nonuniform(<2 x i8> %x, <2 x i8> %y) {
|
|
; CHECK-LABEL: @shl_sub_nonuniform(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i8> [[X:%.*]], <i8 5, i8 4>
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl <2 x i8> [[Y:%.*]], <i8 2, i8 0>
|
|
; CHECK-NEXT: [[SH1:%.*]] = sub <2 x i8> [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret <2 x i8> [[SH1]]
|
|
;
|
|
%sh0 = shl <2 x i8> %x, <i8 3, i8 4>
|
|
%r = sub <2 x i8> %sh0, %y
|
|
%sh1 = shl <2 x i8> %r, <i8 2, i8 0>
|
|
ret <2 x i8> %sh1
|
|
}
|
|
|
|
|
|
define <2 x i64> @shl_sub_poison(<2 x i64> %x, <2 x i64> %py) {
|
|
; CHECK-LABEL: @shl_sub_poison(
|
|
; CHECK-NEXT: [[Y:%.*]] = srem <2 x i64> [[PY:%.*]], <i64 42, i64 42>
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i64> [[X:%.*]], <i64 12, i64 poison>
|
|
; CHECK-NEXT: [[TMP2:%.*]] = shl nsw <2 x i64> [[Y]], <i64 7, i64 poison>
|
|
; CHECK-NEXT: [[SH1:%.*]] = sub <2 x i64> [[TMP2]], [[TMP1]]
|
|
; CHECK-NEXT: ret <2 x i64> [[SH1]]
|
|
;
|
|
%y = srem <2 x i64> %py, <i64 42, i64 42> ; thwart complexity-based canonicalization
|
|
%sh0 = shl <2 x i64> %x, <i64 5, i64 poison>
|
|
%r = sub <2 x i64> %y, %sh0
|
|
%sh1 = shl <2 x i64> %r, <i64 7, i64 poison>
|
|
ret <2 x i64> %sh1
|
|
}
|
|
|
|
|
|
define i8 @lshr_sub(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @lshr_sub(
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr i8 [[X:%.*]], 3
|
|
; CHECK-NEXT: [[R:%.*]] = sub i8 [[SH0]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr i8 [[R]], 2
|
|
; CHECK-NEXT: ret i8 [[SH1]]
|
|
;
|
|
%sh0 = lshr i8 %x, 3
|
|
%r = sub i8 %sh0, %y
|
|
%sh1 = lshr i8 %r, 2
|
|
ret i8 %sh1
|
|
}
|
|
|
|
define <2 x i8> @lshr_sub_nonuniform(<2 x i8> %x, <2 x i8> %y) {
|
|
; CHECK-LABEL: @lshr_sub_nonuniform(
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 3, i8 4>
|
|
; CHECK-NEXT: [[R:%.*]] = sub <2 x i8> [[SH0]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i8> [[R]], <i8 2, i8 0>
|
|
; CHECK-NEXT: ret <2 x i8> [[SH1]]
|
|
;
|
|
%sh0 = lshr <2 x i8> %x, <i8 3, i8 4>
|
|
%r = sub <2 x i8> %sh0, %y
|
|
%sh1 = lshr <2 x i8> %r, <i8 2, i8 0>
|
|
ret <2 x i8> %sh1
|
|
}
|
|
|
|
define <2 x i64> @lshr_sub_poison(<2 x i64> %x, <2 x i64> %py) {
|
|
; CHECK-LABEL: @lshr_sub_poison(
|
|
; CHECK-NEXT: [[Y:%.*]] = srem <2 x i64> [[PY:%.*]], <i64 42, i64 42>
|
|
; CHECK-NEXT: [[SH0:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 5, i64 poison>
|
|
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i64> [[Y]], [[SH0]]
|
|
; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i64> [[R]], <i64 7, i64 poison>
|
|
; CHECK-NEXT: ret <2 x i64> [[SH1]]
|
|
;
|
|
%y = srem <2 x i64> %py, <i64 42, i64 42> ; thwart complexity-based canonicalization
|
|
%sh0 = lshr <2 x i64> %x, <i64 5, i64 poison>
|
|
%r = sub <2 x i64> %y, %sh0
|
|
%sh1 = lshr <2 x i64> %r, <i64 7, i64 poison>
|
|
ret <2 x i64> %sh1
|
|
}
|