04b944e230
The only interesting test change is in @PR31262, where the following fold is now performed, while it previously was not: https://alive2.llvm.org/ce/z/a5Qmr6 llvm/test/Transforms/InstSimplify/ConstProp/gep.ll has not been updated, because there is a tradeoff between folding and inrange preservation there that we may want to discuss. Updates have been performed using: https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34
18 lines
749 B
LLVM
18 lines
749 B
LLVM
; RUN: opt -instcombine -S -o - %s | FileCheck %s
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; Test that we don't replace an alias with its aliasee when simplifying GEPs.
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; In this test case the transformation is invalid because it replaces the
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; reference to the symbol "b" (which refers to whichever instance of "b"
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; was chosen by the linker) with a reference to "a" (which refers to the
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; specific instance of "b" in this module).
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@a = internal global [3 x ptr] zeroinitializer
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@b = linkonce_odr alias [3 x ptr], ptr @a
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define ptr @f() {
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; CHECK: ret ptr getelementptr ([3 x ptr], ptr @b, i64 0, i64 1)
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ret ptr getelementptr ([3 x ptr], ptr @b, i64 0, i64 1)
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}
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