161bfa5f53
Similar to D138404, we were not guarding against extra uses of the Mul. In most cases other checks would catch the issue due to unsupported instructions in the outer loop, but certain non-canonical loop forms could still get through. Fixes #59339 Differential Revision: https://reviews.llvm.org/D141114
58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -S -opaque-pointers -passes='loop(loop-flatten),verify' -verify-loop-info -verify-dom-info -verify-scev | FileCheck %s
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; Check that the mul does not have extra uses.
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define void @test0(ptr %arg, ptr %arg1) {
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; CHECK-LABEL: @test0(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: br label [[DOTPREHEADER:%.*]]
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; CHECK: .preheader:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ 0, [[BB:%.*]] ], [ [[I5:%.*]], [[BB4:%.*]] ]
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; CHECK-NEXT: [[I2:%.*]] = mul i64 [[I]], 3
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; CHECK-NEXT: [[I3:%.*]] = getelementptr i16, ptr [[ARG1:%.*]], i64 [[I2]]
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; CHECK-NEXT: br label [[BB7:%.*]]
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; CHECK: bb4:
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; CHECK-NEXT: [[I5]] = add i64 [[I]], 1
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; CHECK-NEXT: [[I6:%.*]] = icmp slt i64 [[I5]], 2
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; CHECK-NEXT: br i1 [[I6]], label [[DOTPREHEADER]], label [[BB14:%.*]]
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; CHECK: bb7:
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; CHECK-NEXT: [[I8:%.*]] = phi i64 [ 0, [[DOTPREHEADER]] ], [ [[I12:%.*]], [[BB7]] ]
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; CHECK-NEXT: [[I9:%.*]] = load i16, ptr [[I3]], align 2
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; CHECK-NEXT: [[I10:%.*]] = add i64 [[I8]], [[I2]]
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; CHECK-NEXT: [[I11:%.*]] = getelementptr i16, ptr [[ARG:%.*]], i64 [[I10]]
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; CHECK-NEXT: store i16 [[I9]], ptr [[I11]], align 2
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; CHECK-NEXT: [[I12]] = add nuw nsw i64 [[I8]], 1
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; CHECK-NEXT: [[I13:%.*]] = icmp ult i64 [[I12]], 3
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; CHECK-NEXT: br i1 [[I13]], label [[BB7]], label [[BB4]]
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; CHECK: bb14:
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; CHECK-NEXT: ret void
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;
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bb:
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br label %.preheader
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.preheader: ; preds = %bb4, %bb
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%i = phi i64 [ 0, %bb ], [ %i5, %bb4 ]
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%i2 = mul i64 %i, 3
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%i3 = getelementptr i16, ptr %arg1, i64 %i2
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br label %bb7
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bb4: ; preds = %bb7
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%i5 = add i64 %i, 1
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%i6 = icmp slt i64 %i5, 2
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br i1 %i6, label %.preheader, label %bb14
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bb7: ; preds = %bb7, %.preheader
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%i8 = phi i64 [ 0, %.preheader ], [ %i12, %bb7 ]
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%i9 = load i16, ptr %i3, align 2
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%i10 = add i64 %i8, %i2
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%i11 = getelementptr i16, ptr %arg, i64 %i10
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store i16 %i9, ptr %i11, align 2
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%i12 = add nuw nsw i64 %i8, 1
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%i13 = icmp ult i64 %i12, 3
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br i1 %i13, label %bb7, label %bb4
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bb14: ; preds = %bb4
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ret void
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}
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