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https://github.com/c64scene-ar/llvm-6502.git
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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
60 lines
1.3 KiB
LLVM
60 lines
1.3 KiB
LLVM
; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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; GVN should ignore the store to p[1] to see that the load from p[0] is
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; fully redundant.
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; CHECK-LABEL: @yes(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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define void @yes(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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ret void
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}
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; GVN should ignore the store to p[1] to see that the first load from p[0] is
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; fully redundant. However, the second load is larger, so it's not a simple
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; redundancy.
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; CHECK-LABEL: @watch_out_for_size_change(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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; CHECK: if.else:
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; CHECK: load i64, i64* %pc
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; CHECK: store i64
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define void @watch_out_for_size_change(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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%pc = bitcast i32* %p to i64*
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%qc = bitcast i32* %q to i64*
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%t64 = load i64, i64* %pc
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store i64 %t64, i64* %qc
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ret void
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}
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