7fb97bee92
Facts of eq/ne were added to unsigned system only, causing some missing optimizations. This patch adds eq/ne facts to both signed & unsigned constraint system. Fixes #117961.
46 lines
1.8 KiB
LLVM
46 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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define void @pr105785(ptr %p) {
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; CHECK-LABEL: define void @pr105785(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[FOR_COND:.*]]
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; CHECK: [[FOR_COND]]:
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; CHECK-NEXT: [[FOR_IND:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ 1, %[[FOR_COND1:.*]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[FOR_IND]], 0
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; CHECK-NEXT: br i1 [[CMP]], label %[[FOR_COND1]], label %[[FOR_END6:.*]]
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; CHECK: [[FOR_COND1]]:
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; CHECK-NEXT: [[FOR_IND2:%.*]] = phi i32 [ [[INC:%.*]], %[[FOR_BODY3:.*]] ], [ 0, %[[FOR_COND]] ]
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[FOR_IND2]], 3
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; CHECK-NEXT: br i1 [[CMP2]], label %[[FOR_BODY3]], label %[[FOR_COND]]
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; CHECK: [[FOR_BODY3]]:
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; CHECK-NEXT: store i32 -1, ptr [[P]], align 4
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[FOR_IND2]], 1
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; CHECK-NEXT: br label %[[FOR_COND1]]
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; CHECK: [[FOR_END6]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.cond
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for.cond: ; preds = %for.cond1, %entry
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%for.ind = phi i32 [ 0, %entry ], [ 1, %for.cond1 ]
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%cmp = icmp eq i32 %for.ind, 0
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br i1 %cmp, label %for.cond1, label %for.end6
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for.cond1: ; preds = %for.cond, %for.body3
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%for.ind2 = phi i32 [ %inc, %for.body3 ], [ 0, %for.cond ]
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%cmp2 = icmp ult i32 %for.ind2, 3
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br i1 %cmp2, label %for.body3, label %for.cond
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for.body3: ; preds = %for.cond1
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%scmp = call i32 @llvm.scmp.i32.i32(i32 %for.ind, i32 1)
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store i32 %scmp, ptr %p, align 4
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%inc = add nuw nsw i32 %for.ind2, 1
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br label %for.cond1
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for.end6:
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ret void
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}
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