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2e044cdb6c
This fixes https://bugs.llvm.org/show_bug.cgi?id=44425. We need to drop inbounds if one of the GEPs is not inbounds. This was already done when creating a new GEP, but not when modifying in place. Differential Revision: https://reviews.llvm.org/D72059
53 lines
1.9 KiB
LLVM
53 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -instcombine -S < %s | FileCheck %s
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target triple = "x86_64-pc-windows-msvc"
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define i1 @test1(i8* %p) personality i32 (...)* @__CxxFrameHandler3 {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = getelementptr i8, i8* [[P:%.*]], i64 1
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; CHECK-NEXT: invoke void @may_throw()
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; CHECK-NEXT: to label [[INVOKE_CONT:%.*]] unwind label [[CATCH_DISPATCH:%.*]]
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; CHECK: invoke.cont:
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; CHECK-NEXT: [[B:%.*]] = getelementptr i8, i8* [[P]], i64 2
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; CHECK-NEXT: invoke void @may_throw()
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; CHECK-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH_DISPATCH]]
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; CHECK: catch.dispatch:
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; CHECK-NEXT: [[C:%.*]] = phi i8* [ [[B]], [[INVOKE_CONT]] ], [ [[A]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[TMP1:%.*]] = catchswitch within none [label %catch] unwind to caller
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; CHECK: catch:
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; CHECK-NEXT: [[TMP2:%.*]] = catchpad within [[TMP1]] [i8* null, i32 64, i8* null]
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; CHECK-NEXT: catchret from [[TMP2]] to label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[D:%.*]] = phi i8* [ [[A]], [[INVOKE_CONT]] ], [ [[C]], [[CATCH:%.*]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8* [[D]], [[A]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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entry:
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%a = getelementptr i8, i8* %p, i64 1
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invoke void @may_throw()
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to label %invoke.cont unwind label %catch.dispatch
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invoke.cont:
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%b = getelementptr inbounds i8, i8* %a, i64 1
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invoke void @may_throw()
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to label %exit unwind label %catch.dispatch
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catch.dispatch:
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%c = phi i8* [ %b, %invoke.cont ], [ %a, %entry ]
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%tmp1 = catchswitch within none [label %catch] unwind to caller
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catch:
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%tmp2 = catchpad within %tmp1 [i8* null, i32 64, i8* null]
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catchret from %tmp2 to label %exit
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exit:
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%d = phi i8* [ %a, %invoke.cont ], [ %c, %catch ]
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%cmp = icmp eq i8* %d, %a
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ret i1 %cmp
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}
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declare void @may_throw()
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declare i32 @__CxxFrameHandler3(...)
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