mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 19:42:54 +02:00
c93ad7d569
void test(long long *P) { *P ^= 1; }
into just:
_test:
movl 4(%esp), %eax
xorl $1, (%eax)
ret
instead of code like this:
_test:
movl 4(%esp), %ecx
xorl $1, (%ecx)
movl 4(%ecx), %edx
movl %edx, 4(%ecx)
ret
llvm-svn: 45762
12 lines
301 B
LLVM
12 lines
301 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 | not grep '4{(%...)}
|
|
; This should not load or store the top part of *P.
|
|
|
|
define void @test(i64* %P) nounwind {
|
|
entry:
|
|
%tmp1 = load i64* %P, align 8 ; <i64> [#uses=1]
|
|
%tmp2 = xor i64 %tmp1, 1 ; <i64> [#uses=1]
|
|
store i64 %tmp2, i64* %P, align 8
|
|
ret void
|
|
}
|
|
|