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7c9c6ed761
Essentially the same as the GEP change in r230786.
A similar migration script can be used to update test cases, though a few more
test case improvements/changes were required this time around: (r229269-r229278)
import fileinput
import sys
import re
pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)")
for line in sys.stdin:
sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line))
Reviewers: rafael, dexonsmith, grosser
Differential Revision: http://reviews.llvm.org/D7649
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
695 B
LLVM
24 lines
695 B
LLVM
; This testcase tests for a problem where LICM hoists loads out of a loop
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; despite the fact that calls to unknown functions may modify what is being
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; loaded from. Basically if the load gets hoisted, the subtract gets turned
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; into a constant zero.
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;
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; RUN: opt < %s -licm -gvn -instcombine -S | grep load
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@X = global i32 7 ; <i32*> [#uses=2]
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declare void @foo()
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define i32 @test(i1 %c) {
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%A = load i32, i32* @X ; <i32> [#uses=1]
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br label %Loop
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Loop: ; preds = %Loop, %0
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call void @foo( )
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;; Should not hoist this load!
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%B = load i32, i32* @X ; <i32> [#uses=1]
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br i1 %c, label %Loop, label %Out
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Out: ; preds = %Loop
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%C = sub i32 %A, %B ; <i32> [#uses=1]
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ret i32 %C
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}
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