54 lines
1.7 KiB
LLVM
54 lines
1.7 KiB
LLVM
|
; RUN: llc < %s -mcpu=corei7 -mtriple=x86_64-pc-win64 | FileCheck %s
|
||
|
|
|
||
|
|
; CHECK: merge_stores_can
|
||
|
|
; CHECK: callq foo
|
||
|
|
; CHECK: xorps %xmm0, %xmm0
|
||
|
|
; CHECK-NEXT: movups %xmm0
|
||
|
|
; CHECK-NEXT: movl 36(%rsp), %ebp
|
||
|
|
; CHECK: callq foo
|
||
|
|
; CHECK: ret
|
||
|
|
declare i32 @foo([10 x i32]* )
|
||
|
|
|
||
|
|
define i32 @merge_stores_can() nounwind ssp {
|
||
|
|
%object1 = alloca [10 x i32]
|
||
|
|
|
||
|
|
%ret0 = call i32 @foo([10 x i32]* %object1) nounwind
|
||
|
|
|
||
|
|
%O1_1 = getelementptr [10 x i32], [10 x i32]* %object1, i64 0, i32 1
|
||
|
|
%O1_2 = getelementptr [10 x i32], [10 x i32]* %object1, i64 0, i32 2
|
||
|
|
%O1_3 = getelementptr [10 x i32], [10 x i32]* %object1, i64 0, i32 3
|
||
|
|
%O1_4 = getelementptr [10 x i32], [10 x i32]* %object1, i64 0, i32 4
|
||
|
|
%ld_ptr = getelementptr [10 x i32], [10 x i32]* %object1, i64 0, i32 9
|
||
|
|
|
||
|
|
store i32 0, i32* %O1_1
|
||
|
|
store i32 0, i32* %O1_2
|
||
|
|
%ret = load i32, i32* %ld_ptr ; <--- does not alias.
|
||
|
|
store i32 0, i32* %O1_3
|
||
|
|
store i32 0, i32* %O1_4
|
||
|
|
|
||
|
|
%ret1 = call i32 @foo([10 x i32]* %object1) nounwind
|
||
|
|
|
||
|
|
ret i32 %ret
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: merge_stores_cant
|
||
|
|
; CHECK-NOT: xorps %xmm0, %xmm0
|
||
|
|
; CHECK-NOT: movups %xmm0
|
||
|
|
; CHECK: ret
|
||
|
|
define i32 @merge_stores_cant([10 x i32]* %in0, [10 x i32]* %in1) nounwind ssp {
|
||
|
|
|
||
|
|
%O1_1 = getelementptr [10 x i32], [10 x i32]* %in1, i64 0, i32 1
|
||
|
|
%O1_2 = getelementptr [10 x i32], [10 x i32]* %in1, i64 0, i32 2
|
||
|
|
%O1_3 = getelementptr [10 x i32], [10 x i32]* %in1, i64 0, i32 3
|
||
|
|
%O1_4 = getelementptr [10 x i32], [10 x i32]* %in1, i64 0, i32 4
|
||
|
|
%ld_ptr = getelementptr [10 x i32], [10 x i32]* %in0, i64 0, i32 2
|
||
|
|
|
||
|
|
store i32 0, i32* %O1_1
|
||
|
|
store i32 0, i32* %O1_2
|
||
|
|
%ret = load i32, i32* %ld_ptr ; <--- may alias
|
||
|
|
store i32 0, i32* %O1_3
|
||
|
|
store i32 0, i32* %O1_4
|
||
|
|
|
||
|
|
ret i32 %ret
|
||
|
|
}
|