derek.holloway
7502bf64a4
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61 lines
2.6 KiB
LLVM
61 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes=gvn < %s | FileCheck %s
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; Regression test for a GVN PRE assertion crash in PerformLoadPRE.
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@b = external global [1 x i32]
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define void @e() {
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; CHECK-LABEL: define void @e() {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 true, label %[[FOR_END4:.*]], label %[[ENTRY_C_CRIT_EDGE:.*]]
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; CHECK: [[ENTRY_C_CRIT_EDGE]]:
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; CHECK-NEXT: [[DOTPRE1:%.*]] = load i32, ptr null, align 4
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; CHECK-NEXT: br label %[[C:.*]]
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; CHECK: [[FOR_END4]]:
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; CHECK-NEXT: store i32 0, ptr getelementptr inbounds nuw (i8, ptr @b, i64 4), align 4
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; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr null, align 4
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; CHECK-NEXT: br label %[[FOR_COND5:.*]]
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; CHECK: [[FOR_COND5]]:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[TMP1:%.*]], %[[C]] ], [ [[DOTPRE]], %[[FOR_END4]] ]
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; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[CMP6]], label %[[FOR_COND5_C_CRIT_EDGE:.*]], label %[[FOR_END8:.*]]
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; CHECK: [[FOR_COND5_C_CRIT_EDGE]]:
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; CHECK-NEXT: [[DOTPRE2:%.*]] = load i32, ptr getelementptr inbounds nuw (i8, ptr @b, i64 4), align 4
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; CHECK-NEXT: br label %[[C]]
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; CHECK: [[C]]:
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; CHECK-NEXT: [[TMP1]] = phi i32 [ poison, %[[ENTRY_C_CRIT_EDGE]] ], [ [[DOTPRE2]], %[[FOR_COND5_C_CRIT_EDGE]] ]
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; CHECK-NEXT: [[TMP2:%.*]] = phi i32 [ [[DOTPRE1]], %[[ENTRY_C_CRIT_EDGE]] ], [ 0, %[[FOR_COND5_C_CRIT_EDGE]] ]
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; CHECK-NEXT: [[ADD:%.*]] = add i32 [[TMP2]], 1
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; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[ADD]] to i64
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr [4 x i8], ptr @b, i64 [[IDXPROM]]
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; CHECK-NEXT: store i32 [[TMP1]], ptr null, align 4
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; CHECK-NEXT: br label %[[FOR_COND5]]
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; CHECK: [[FOR_END8]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 true, label %for.end4, label %c
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for.end4: ; preds = %entry
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store i32 0, ptr getelementptr inbounds nuw (i8, ptr @b, i64 4), align 4
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br label %for.cond5
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for.cond5: ; preds = %c, %for.end4
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%0 = load i32, ptr null, align 4
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%cmp6 = icmp eq i32 %0, 0
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br i1 %cmp6, label %c, label %for.end8
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c: ; preds = %for.cond5, %entry
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%1 = load i32, ptr null, align 4
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%add = add i32 %1, 1
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%idxprom = zext i32 %add to i64
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%arrayidx = getelementptr [4 x i8], ptr @b, i64 %idxprom
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%2 = load i32, ptr %arrayidx, align 4
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store i32 %2, ptr null, align 4
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br label %for.cond5
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for.end8: ; preds = %for.cond5
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ret void
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}
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