[llvm] [ValueTracking] Improve `isImpliedCondICmps` to handle binops (PR #69840)
via llvm-commits
llvm-commits at lists.llvm.org
Sat Oct 21 05:55:03 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-analysis
Author: Yingwei Zheng (dtcxzyw)
<details>
<summary>Changes</summary>
This PR improves `isImpliedCondICmps` to handle the pattern `R0 = L0 binop V`.
Alive2: https://alive2.llvm.org/ce/z/PPCfP9
Fixes #<!-- -->68799.
---
Full diff: https://github.com/llvm/llvm-project/pull/69840.diff
4 Files Affected:
- (modified) llvm/lib/Analysis/ValueTracking.cpp (+41-7)
- (added) llvm/test/Analysis/ValueTracking/implied-icmp-binop.ll (+193)
- (modified) llvm/test/Transforms/InstCombine/icmp-or.ll (+4-14)
- (modified) llvm/test/Transforms/InstCombine/icmp-power2-and-icmp-shifted-mask.ll (+8-32)
``````````diff
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 8824a05e3aa6ccd..e1fae66946e0e56 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -8231,14 +8231,11 @@ isImpliedCondMatchingOperands(CmpInst::Predicate LPred,
return std::nullopt;
}
-/// Return true if "icmp LPred X, LC" implies "icmp RPred X, RC" is true.
-/// Return false if "icmp LPred X, LC" implies "icmp RPred X, RC" is false.
+/// Return true if `X in DomCR` implies `X in CR` is true.
+/// Return false if `X in DomCR` implies `X in CR` is false.
/// Otherwise, return std::nullopt if we can't infer anything.
-static std::optional<bool> isImpliedCondCommonOperandWithConstants(
- CmpInst::Predicate LPred, const APInt &LC, CmpInst::Predicate RPred,
- const APInt &RC) {
- ConstantRange DomCR = ConstantRange::makeExactICmpRegion(LPred, LC);
- ConstantRange CR = ConstantRange::makeExactICmpRegion(RPred, RC);
+static std::optional<bool> isImpliedCondWithRange(const ConstantRange &DomCR,
+ const ConstantRange &CR) {
ConstantRange Intersection = DomCR.intersectWith(CR);
ConstantRange Difference = DomCR.difference(CR);
if (Intersection.isEmptySet())
@@ -8248,6 +8245,17 @@ static std::optional<bool> isImpliedCondCommonOperandWithConstants(
return std::nullopt;
}
+/// Return true if "icmp LPred X, LC" implies "icmp RPred X, RC" is true.
+/// Return false if "icmp LPred X, LC" implies "icmp RPred X, RC" is false.
+/// Otherwise, return std::nullopt if we can't infer anything.
+static std::optional<bool> isImpliedCondCommonOperandWithConstants(
+ CmpInst::Predicate LPred, const APInt &LC, CmpInst::Predicate RPred,
+ const APInt &RC) {
+ ConstantRange DomCR = ConstantRange::makeExactICmpRegion(LPred, LC);
+ ConstantRange CR = ConstantRange::makeExactICmpRegion(RPred, RC);
+ return isImpliedCondWithRange(DomCR, CR);
+}
+
/// Return true if LHS implies RHS (expanded to its components as "R0 RPred R1")
/// is true. Return false if LHS implies RHS is false. Otherwise, return
/// std::nullopt if we can't infer anything.
@@ -8298,6 +8306,32 @@ static std::optional<bool> isImpliedCondICmps(const ICmpInst *LHS,
return LPred == RPred;
}
+ // handle R0 = L0 binop V
+ Value *R0Op1 = nullptr;
+ if (match(L1, m_APInt(LC)) && match(R1, m_APInt(RC)) &&
+ match(R0, m_c_BinOp(m_Specific(L0), m_Value(R0Op1)))) {
+ ConstantRange LHSRange = ConstantRange::makeExactICmpRegion(LPred, *LC);
+ ConstantRange CR = ConstantRange::makeExactICmpRegion(RPred, *RC);
+ // TODO: use contextual information from SimplifyQuery
+ ConstantRange RHSRange = computeConstantRange(
+ R0Op1, ICmpInst::isSigned(RPred), /*UseInstrInfo*/ true, /*AC*/ nullptr,
+ /*CtxI*/ nullptr, /*DT*/ nullptr, Depth);
+ auto BO = cast<BinaryOperator>(R0);
+ if (BO->getOperand(0) != L0)
+ std::swap(LHSRange, RHSRange);
+ unsigned NoWrapKind = 0;
+ if (auto *OBO = dyn_cast<OverflowingBinaryOperator>(BO)) {
+ if (OBO->hasNoUnsignedWrap())
+ NoWrapKind |= OverflowingBinaryOperator::NoUnsignedWrap;
+ if (OBO->hasNoSignedWrap())
+ NoWrapKind |= OverflowingBinaryOperator::NoSignedWrap;
+ }
+ ConstantRange Range =
+ LHSRange.overflowingBinaryOp(BO->getOpcode(), RHSRange, NoWrapKind);
+ if (auto Res = isImpliedCondWithRange(Range, CR))
+ return Res;
+ }
+
if (LPred == RPred)
return isImpliedCondOperands(LPred, L0, L1, R0, R1, DL, Depth);
diff --git a/llvm/test/Analysis/ValueTracking/implied-icmp-binop.ll b/llvm/test/Analysis/ValueTracking/implied-icmp-binop.ll
new file mode 100644
index 000000000000000..882c38f329bd884
--- /dev/null
+++ b/llvm/test/Analysis/ValueTracking/implied-icmp-binop.ll
@@ -0,0 +1,193 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt -passes=instcombine -S < %s | FileCheck %s
+
+; Tests from PR68799
+
+define i1 @f_and(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_and(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 false
+;
+entry:
+ %cmp = icmp ne i32 %x, 0
+ %0 = or i32 %x, %y
+ %and14 = icmp eq i32 %0, 0
+ %and1115 = and i1 %cmp, %and14
+ ret i1 %and1115
+}
+
+define i1 @f_or(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_or(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 true
+;
+entry:
+ %cmp.not = icmp eq i32 %x, 0
+ %0 = or i32 %x, %y
+ %or14 = icmp ne i32 %0, 0
+ %or1115 = or i1 %cmp.not, %or14
+ ret i1 %or1115
+}
+
+; Tests for more binops
+
+define i1 @f_add(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_add(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 false
+;
+entry:
+ %yr = and i32 %y, 7
+ %cmp = icmp ult i32 %x, 8
+ %0 = add i32 %yr, %x
+ %cmp2 = icmp ugt i32 %0, 16
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+define i1 @f_add_nsw(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_add_nsw(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 false
+;
+entry:
+ %yr = and i32 %y, 2147483647
+ %cmp = icmp sgt i32 %x, 5
+ %0 = add nsw i32 %yr, %x
+ %cmp2 = icmp slt i32 %0, 5
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+define i1 @f_add_nuw(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_add_nuw(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 false
+;
+entry:
+ %cmp = icmp ugt i32 %x, 1
+ %0 = add nuw i32 %x, %y
+ %cmp2 = icmp eq i32 %0, 1
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+define i1 @f_sub_nsw(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_sub_nsw(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[X]], 5
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+entry:
+ %yr = and i32 %y, 2147483647
+ %cmp = icmp slt i32 %x, 5
+ %0 = sub nsw i32 %x, %yr
+ %cmp2 = icmp slt i32 %0, 5
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+define i1 @f_sub_nuw(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_sub_nuw(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: ret i1 false
+;
+entry:
+ %cmp = icmp ult i32 %x, 5
+ %0 = sub nuw i32 %x, %y
+ %cmp2 = icmp eq i32 %0, 6
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+; Negative tests
+
+; non-constant range
+define i1 @f_add_nofold1(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: define i1 @f_add_nofold1(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]], i32 [[Z:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[YR:%.*]] = and i32 [[Y]], 7
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X]], [[Z]]
+; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[YR]], [[X]]
+; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[TMP0]], 16
+; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP]], [[CMP2]]
+; CHECK-NEXT: ret i1 [[AND]]
+;
+entry:
+ %yr = and i32 %y, 7
+ %cmp = icmp ult i32 %x, %z
+ %0 = add i32 %yr, %x
+ %cmp2 = icmp ugt i32 %0, 16
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+define i1 @f_add_nofold2(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: define i1 @f_add_nofold2(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]], i32 [[Z:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[YR:%.*]] = and i32 [[Y]], 7
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X]], 8
+; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[YR]], [[X]]
+; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[TMP0]], [[Z]]
+; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP]], [[CMP2]]
+; CHECK-NEXT: ret i1 [[AND]]
+;
+entry:
+ %yr = and i32 %y, 7
+ %cmp = icmp ult i32 %x, 8
+ %0 = add i32 %yr, %x
+ %cmp2 = icmp ugt i32 %0, %z
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+; narrower range
+define i1 @f_add_nofold3(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_add_nofold3(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[YR:%.*]] = and i32 [[Y]], 7
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X]], 8
+; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[YR]], [[X]]
+; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[TMP0]], 10
+; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP]], [[CMP2]]
+; CHECK-NEXT: ret i1 [[AND]]
+;
+entry:
+ %yr = and i32 %y, 7
+ %cmp = icmp ult i32 %x, 8
+ %0 = add i32 %yr, %x
+ %cmp2 = icmp ugt i32 %0, 10
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
+
+; sub is not commutative
+define i1 @f_sub_nsw_nofold(i32 %x, i32 %y) {
+; CHECK-LABEL: define i1 @f_sub_nsw_nofold(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[YR:%.*]] = and i32 [[Y]], 2147483647
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[X]], 5
+; CHECK-NEXT: [[TMP0:%.*]] = sub nsw i32 [[YR]], [[X]]
+; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[TMP0]], 5
+; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP]], [[CMP2]]
+; CHECK-NEXT: ret i1 [[AND]]
+;
+entry:
+ %yr = and i32 %y, 2147483647
+ %cmp = icmp slt i32 %x, 5
+ %0 = sub nsw i32 %yr, %x
+ %cmp2 = icmp slt i32 %0, 5
+ %and = and i1 %cmp, %cmp2
+ ret i1 %and
+}
diff --git a/llvm/test/Transforms/InstCombine/icmp-or.ll b/llvm/test/Transforms/InstCombine/icmp-or.ll
index 922845c1e7e2d82..a96341f31132943 100644
--- a/llvm/test/Transforms/InstCombine/icmp-or.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-or.ll
@@ -430,13 +430,8 @@ define i1 @icmp_or_xor_2_ne_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
define i1 @icmp_or_xor_2_3_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
; CHECK-LABEL: @icmp_or_xor_2_3_fail(
-; CHECK-NEXT: [[XOR:%.*]] = xor i64 [[X1:%.*]], [[Y1:%.*]]
-; CHECK-NEXT: [[XOR1:%.*]] = xor i64 [[X2:%.*]], [[Y2:%.*]]
-; CHECK-NEXT: [[OR:%.*]] = or i64 [[XOR]], [[XOR1]]
-; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[OR]], 0
-; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i64 [[XOR]], 0
-; CHECK-NEXT: [[OR1:%.*]] = or i1 [[CMP]], [[CMP_1]]
-; CHECK-NEXT: ret i1 [[OR1]]
+; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i64 [[X1:%.*]], [[Y1:%.*]]
+; CHECK-NEXT: ret i1 [[CMP_1]]
;
%xor = xor i64 %x1, %y1
%xor1 = xor i64 %x2, %y2
@@ -451,13 +446,8 @@ define i1 @icmp_or_xor_2_3_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
define i1 @icmp_or_xor_2_4_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
; CHECK-LABEL: @icmp_or_xor_2_4_fail(
-; CHECK-NEXT: [[XOR:%.*]] = xor i64 [[X1:%.*]], [[Y1:%.*]]
-; CHECK-NEXT: [[XOR1:%.*]] = xor i64 [[X2:%.*]], [[Y2:%.*]]
-; CHECK-NEXT: [[OR:%.*]] = or i64 [[XOR]], [[XOR1]]
-; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[OR]], 0
-; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i64 [[XOR1]], 0
-; CHECK-NEXT: [[OR1:%.*]] = or i1 [[CMP]], [[CMP_1]]
-; CHECK-NEXT: ret i1 [[OR1]]
+; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i64 [[X2:%.*]], [[Y2:%.*]]
+; CHECK-NEXT: ret i1 [[CMP_1]]
;
%xor = xor i64 %x1, %y1
%xor1 = xor i64 %x2, %y2
diff --git a/llvm/test/Transforms/InstCombine/icmp-power2-and-icmp-shifted-mask.ll b/llvm/test/Transforms/InstCombine/icmp-power2-and-icmp-shifted-mask.ll
index 82fcca07a00ac66..27ecc5686066cf1 100644
--- a/llvm/test/Transforms/InstCombine/icmp-power2-and-icmp-shifted-mask.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-power2-and-icmp-shifted-mask.ll
@@ -250,10 +250,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_swapped_256_239_gap_in_mask_fail(i3
define i1 @icmp_power2_and_icmp_shifted_mask_8_112_mask_to_left_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_8_112_mask_to_left_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 112
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 112
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T1]], [[T3]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 112
@@ -265,10 +262,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_8_112_mask_to_left_fail(i32 %x) {
define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_112_mask_to_left_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_swapped_8_112_mask_to_left_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 112
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 112
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T3]], [[T1]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 112
@@ -281,10 +275,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_112_mask_to_left_fail(i32
define i1 @icmp_power2_and_icmp_shifted_mask_8_56_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_8_56_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 56
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 56
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T1]], [[T3]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 56
@@ -296,10 +287,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_8_56_mask_overlap_fail(i32 %x) {
define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_56_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_swapped_8_56_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 56
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 56
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T3]], [[T1]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 56
@@ -312,10 +300,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_56_mask_overlap_fail(i32
define i1 @icmp_power2_and_icmp_shifted_mask_8_24_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_8_24_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 24
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 24
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T1]], [[T3]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 24
@@ -327,10 +312,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_8_24_mask_overlap_fail(i32 %x) {
define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_24_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_swapped_8_24_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 24
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 24
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T3]], [[T1]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 24
@@ -343,10 +325,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_24_mask_overlap_fail(i32
define i1 @icmp_power2_and_icmp_shifted_mask_8_12_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_8_12_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 12
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 12
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T1]], [[T3]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 12
@@ -358,10 +337,7 @@ define i1 @icmp_power2_and_icmp_shifted_mask_8_12_mask_overlap_fail(i32 %x) {
define i1 @icmp_power2_and_icmp_shifted_mask_swapped_8_12_mask_overlap_fail(i32 %x) {
; CHECK-LABEL: @icmp_power2_and_icmp_shifted_mask_swapped_8_12_mask_overlap_fail(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 [[X:%.*]], 8
-; CHECK-NEXT: [[T2:%.*]] = and i32 [[X]], 12
-; CHECK-NEXT: [[T3:%.*]] = icmp ne i32 [[T2]], 12
-; CHECK-NEXT: [[T4:%.*]] = and i1 [[T3]], [[T1]]
-; CHECK-NEXT: ret i1 [[T4]]
+; CHECK-NEXT: ret i1 [[T1]]
;
%t1 = icmp ult i32 %x, 8
%t2 = and i32 %x, 12
``````````
</details>
https://github.com/llvm/llvm-project/pull/69840
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