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llvm-project/llvm/test/Transforms/SCCP/global-alias-constprop.ll

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[ConstantFolding] Support folding loads from a GlobalAlias The MSVC ABI requires that we generate an alias for the vtable which means looking through a GlobalAlias which cannot be overridden improves our ability to devirtualize. Found while investigating PR20801. Patch by Andrew Zhogin! Differential Revision: http://reviews.llvm.org/D11306 llvm-svn: 242955
2015-07-23 06:29:30 +08:00
; RUN: opt < %s -sccp -S | FileCheck %s
[PM] Port per-function SCCP to the new pass manager. llvm-svn: 269937
2016-05-18 23:18:25 +08:00
; RUN: opt < %s -passes=sccp -S | FileCheck %s
[ConstantFolding] Support folding loads from a GlobalAlias The MSVC ABI requires that we generate an alias for the vtable which means looking through a GlobalAlias which cannot be overridden improves our ability to devirtualize. Found while investigating PR20801. Patch by Andrew Zhogin! Differential Revision: http://reviews.llvm.org/D11306 llvm-svn: 242955
2015-07-23 06:29:30 +08:00
@0 = private unnamed_addr constant [2 x i32] [i32 -1, i32 1]
[opaque pointer type] Add textual IR support for explicit type parameter for global aliases update.py: import fileinput import sys import re alias_match_prefix = r"(.*(?:=|:|^)\s*(?:external |)(?:(?:private|internal|linkonce|linkonce_odr|weak|weak_odr|common|appending|extern_weak|available_externally) )?(?:default |hidden |protected )?(?:dllimport |dllexport )?(?:unnamed_addr |)(?:thread_local(?:\([a-z]*\))? )?alias" plain = re.compile(alias_match_prefix + r" (.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|addrspacecast|\[\[[a-zA-Z]|\{\{).*$)") cast = re.compile(alias_match_prefix + r") ((?:bitcast|inttoptr|addrspacecast)\s*\(.* to (.*?)(| addrspace\(\d+\) *)\*\)\s*(?:;.*)?$)") gep = re.compile(alias_match_prefix + r") ((?:getelementptr)\s*(?:inbounds)?\s*\((?P<type>.*), (?P=type)(?:\s*addrspace\(\d+\)\s*)?\* .*\)\s*(?:;.*)?$)") def conv(line): m = re.match(cast, line) if m: return m.group(1) + " " + m.group(3) + ", " + m.group(2) m = re.match(gep, line) if m: return m.group(1) + " " + m.group(3) + ", " + m.group(2) m = re.match(plain, line) if m: return m.group(1) + ", " + m.group(2) + m.group(3) + "*" + m.group(4) + "\n" return line for line in sys.stdin: sys.stdout.write(conv(line)) apply.sh: for name in "$@" do python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name" rm -f "$name.tmp" done The actual commands: From llvm/src: find test/ -name *.ll | xargs ./apply.sh From llvm/src/tools/clang: find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}" From llvm/src/tools/polly: find test/ -name *.ll | xargs ./apply.sh llvm-svn: 247378
2015-09-11 11:22:04 +08:00
@"\01??_7A@@6B@" = unnamed_addr alias i32, getelementptr inbounds ([2 x i32], [2 x i32]* @0, i32 0, i32 1)
[ConstantFolding] Support folding loads from a GlobalAlias The MSVC ABI requires that we generate an alias for the vtable which means looking through a GlobalAlias which cannot be overridden improves our ability to devirtualize. Found while investigating PR20801. Patch by Andrew Zhogin! Differential Revision: http://reviews.llvm.org/D11306 llvm-svn: 242955
2015-07-23 06:29:30 +08:00
; CHECK: ret i32 1
define i32 @main() {
%a = load i32, i32* @"\01??_7A@@6B@"
ret i32 %a
}