mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-14 13:07:31 +00:00
8b944d39b3
e.g. orl $65536, 8(%rax) => orb $1, 10(%rax) Since narrowing is not always a win, e.g. i32 -> i16 is a loss on x86, dag combiner consults with the target before performing the optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72507 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
724 B
LLVM
24 lines
724 B
LLVM
; RUN: llvm-as < %s | llc -march=x86-64 | grep andb | count 2
|
|
; RUN: llvm-as < %s | llc -march=x86-64 | grep andb | grep 254
|
|
; RUN: llvm-as < %s | llc -march=x86-64 | grep andb | grep 253
|
|
|
|
%struct.bf = type { i64, i16, i16, i32 }
|
|
@bfi = external global %struct.bf*
|
|
|
|
define void @t1() nounwind ssp {
|
|
entry:
|
|
%0 = load %struct.bf** @bfi, align 8
|
|
%1 = getelementptr %struct.bf* %0, i64 0, i32 1
|
|
%2 = bitcast i16* %1 to i32*
|
|
%3 = load i32* %2, align 1
|
|
%4 = and i32 %3, -65537
|
|
store i32 %4, i32* %2, align 1
|
|
%5 = load %struct.bf** @bfi, align 8
|
|
%6 = getelementptr %struct.bf* %5, i64 0, i32 1
|
|
%7 = bitcast i16* %6 to i32*
|
|
%8 = load i32* %7, align 1
|
|
%9 = and i32 %8, -131073
|
|
store i32 %9, i32* %7, align 1
|
|
ret void
|
|
}
|