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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
37 lines
1.1 KiB
LLVM
37 lines
1.1 KiB
LLVM
; RUN: opt < %s -basicaa -gvn -instcombine -S | FileCheck %s
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declare i32* @test(i32* nocapture)
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define i32 @test2() {
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; CHECK: ret i32 0
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%P = alloca i32
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%Q = call i32* @test(i32* %P)
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%a = load i32, i32* %P
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store i32 4, i32* %Q ;; cannot clobber P since it is nocapture.
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%b = load i32, i32* %P
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%c = sub i32 %a, %b
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ret i32 %c
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}
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declare void @test3(i32** %p, i32* %q) nounwind
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define i32 @test4(i32* noalias nocapture %p) nounwind {
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; CHECK: call void @test3
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; CHECK: store i32 0, i32* %p
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; CHECK: store i32 1, i32* %x
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; CHECK: %y = load i32, i32* %p
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; CHECK: ret i32 %y
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entry:
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%q = alloca i32*
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; Here test3 might store %p to %q. This doesn't violate %p's nocapture
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; attribute since the copy doesn't outlive the function.
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call void @test3(i32** %q, i32* %p) nounwind
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store i32 0, i32* %p
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%x = load i32*, i32** %q
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; This store might write to %p and so we can't eliminate the subsequent
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; load
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store i32 1, i32* %x
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%y = load i32, i32* %p
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ret i32 %y
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}
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