6f68d039a5
As seen in #111585, we can end up using a previous cache entry where the size was too large and was UB. Compile time impact: https://llvm-compile-time-tracker.com/compare.php?from=6a863f7e2679a60f2f38ae6a920d0b6e1a2c1690&to=faccf4e1f47fcd5360a438de2a56d02b770ad498&stat=instructions:u. Fixes #111585.
68 lines
1.9 KiB
LLVM
68 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes=gvn -dom-tree-reachability-max-bbs-to-explore=1 -S < %s | FileCheck %s
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define i8 @f(i1 %arg0, i1 %arg1, i1 %arg2) {
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; CHECK-LABEL: define i8 @f(
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; CHECK-SAME: i1 [[ARG0:%.*]], i1 [[ARG1:%.*]], i1 [[ARG2:%.*]]) {
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; CHECK-NEXT: [[BB:.*:]]
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; CHECK-NEXT: br i1 [[ARG2]], label %[[BB2:.*]], label %[[BB11:.*]]
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; CHECK: [[BB11]]:
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; CHECK-NEXT: br label %[[BB3:.*]]
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; CHECK: [[BB2]]:
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; CHECK-NEXT: br label %[[BB3]]
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; CHECK: [[BB3]]:
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; CHECK-NEXT: [[CALL:%.*]] = tail call noalias ptr @_Znwm(i64 2)
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; CHECK-NEXT: br label %[[BB4:.*]]
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; CHECK: [[BB4]]:
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; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ null, %[[BB4]] ], [ [[CALL]], %[[BB3]] ]
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; CHECK-NEXT: store i8 2, ptr [[PHI]], align 4
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; CHECK-NEXT: br i1 [[ARG0]], label %[[BB5:.*]], label %[[BB4]]
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; CHECK: [[BB5]]:
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; CHECK-NEXT: br i1 [[ARG1]], label %[[BB7:.*]], label %[[BB6:.*]]
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; CHECK: [[BB6]]:
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; CHECK-NEXT: call void @use(i64 undef)
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; CHECK-NEXT: br label %[[BB9:.*]]
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; CHECK: [[BB7]]:
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; CHECK-NEXT: [[LOAD8:%.*]] = load i8, ptr [[CALL]], align 4
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; CHECK-NEXT: br label %[[BB9]]
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; CHECK: [[BB9]]:
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; CHECK-NEXT: [[PHI10:%.*]] = phi i8 [ [[LOAD8]], %[[BB7]] ], [ 4, %[[BB6]] ]
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; CHECK-NEXT: ret i8 [[PHI10]]
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;
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bb:
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br i1 %arg2, label %bb2, label %bb11
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bb11:
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br label %bb3
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bb2:
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br label %bb3
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bb3:
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%call = tail call noalias ptr @_Znwm(i64 2)
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br label %bb4
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bb4:
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%phi = phi ptr [ null, %bb4 ], [ %call, %bb3 ]
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store i8 2, ptr %phi, align 4
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br i1 %arg0, label %bb5, label %bb4
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bb5:
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br i1 %arg1, label %bb7, label %bb6
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bb6:
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%load = load i64, ptr %call, align 4
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call void @use(i64 %load)
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br label %bb9
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bb7:
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%load8 = load i8, ptr %call, align 4
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br label %bb9
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bb9:
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%phi10 = phi i8 [ %load8, %bb7 ], [ 4, %bb6 ]
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ret i8 %phi10
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}
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declare ptr @_Znwm(i64)
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declare void @use(i64)
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