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b6e7ff238c
This patch does the following things: 1. update SymbolicallyEvaluateGEP so that it bails out if it cannot preserve inrange arribute; 2. update llvm/test/Analysis/ConstantFolding/gep.ll to remove UB in it; 3. remove inaccurate comment above ConstantFoldInstOperandsImpl in llvm/lib/Analysis/ConstantFolding.cpp; 4. add a new regression test that makes sure that no optimizations change an inrange GEP in an unexpected way. Patch by Zhaomo Yang! Differential Revision: https://reviews.llvm.org/D51698 llvm-svn: 341888
19 lines
679 B
LLVM
19 lines
679 B
LLVM
; RUN: opt -O0 -S < %s | FileCheck %s
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; RUN: opt -O1 -S < %s | FileCheck %s
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; RUN: opt -O2 -S < %s | FileCheck %s
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; RUN: opt -O3 -S < %s | FileCheck %s
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; RUN: opt -Os -S < %s | FileCheck %s
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; RUN: opt -Oz -S < %s | FileCheck %s
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target datalayout = "e-p:64:64"
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; Make sure that optimizations do not optimize inrange GEP.
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@vtable = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* null, i8* null] }
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define void @foo(i8*** %p) {
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;CHECK: store i8** getelementptr {{.*}} ({ [3 x i8*] }, { [3 x i8*] }* @vtable, i{{.*}} 0, inrange i32 0, i{{.*}} 3), i8*** %p
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store i8** getelementptr ({ [3 x i8*] }, { [3 x i8*] }* @vtable, i32 0, inrange i32 0, i32 3), i8*** %p
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ret void
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}
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