mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 22:32:47 +00:00
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
62 lines
1.3 KiB
LLVM
62 lines
1.3 KiB
LLVM
; Test that GCSE uses basicaa to do alias analysis, which is capable of
|
|
; disambiguating some obvious cases. All loads should be removable in
|
|
; this testcase.
|
|
|
|
; RUN: opt < %s -basicaa -gvn -instcombine -dce -S | FileCheck %s
|
|
|
|
@A = global i32 7
|
|
@B = global i32 8
|
|
|
|
; CHECK: define i32 @test()
|
|
; CHECK-NEXT: store i32 123, i32* @B
|
|
; CHECK-NEXT: ret i32 0
|
|
|
|
define i32 @test() {
|
|
%A1 = load i32, i32* @A
|
|
|
|
store i32 123, i32* @B ; Store cannot alias @A
|
|
|
|
%A2 = load i32, i32* @A
|
|
%X = sub i32 %A1, %A2
|
|
ret i32 %X
|
|
}
|
|
|
|
; CHECK: define i32 @test2()
|
|
; CHECK-NEXT: br label %Loop
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: store i32 0, i32* @B
|
|
; CHECK-NEXT: br i1 true, label %out, label %Loop
|
|
; CHECK: out:
|
|
; CHECK-NEXT: ret i32 0
|
|
|
|
define i32 @test2() {
|
|
%A1 = load i32, i32* @A
|
|
br label %Loop
|
|
Loop:
|
|
%AP = phi i32 [0, %0], [%X, %Loop]
|
|
store i32 %AP, i32* @B ; Store cannot alias @A
|
|
|
|
%A2 = load i32, i32* @A
|
|
%X = sub i32 %A1, %A2
|
|
%c = icmp eq i32 %X, 0
|
|
br i1 %c, label %out, label %Loop
|
|
|
|
out:
|
|
ret i32 %X
|
|
}
|
|
|
|
declare void @external()
|
|
|
|
; CHECK: define i32 @test3()
|
|
; CHECK-NEXT: call void @external()
|
|
; CHECK-NEXT: ret i32 7
|
|
|
|
define i32 @test3() {
|
|
%X = alloca i32
|
|
store i32 7, i32* %X
|
|
call void @external()
|
|
%V = load i32, i32* %X
|
|
ret i32 %V
|
|
}
|
|
|