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[AArch64] Add store post-index update folding regression tests for the load/store optimizer. 

Add regression tests for the following transformation:

  str X, [x20]
   ...
  add x20, x20, #32
   ->
  str X, [x20], #32

with X being either w0, x0, s0, d0 or q0.

llvm-svn: 209715
This commit is contained in:
Tilmann Scheller 2014-05-28 06:43:00 +00:00
parent a55ed26abf
commit 7c747fc7c6
1 changed files with 125 additions and 0 deletions
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125
llvm/test/CodeGen/AArch64/ldst-opt.ll
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@ -294,6 +294,131 @@ exit:
ret void
}
; Check the following transform:
;
; str X, [x20]
; ...
; add x20, x20, #32
; ->
; str X, [x20], #32
;
; with X being either w0, x0, s0, d0 or q0.
define void @store-post-indexed-word(i32* %array, i64 %count, i32 %val) nounwind {
; CHECK-LABEL: store-post-indexed-word
; CHECK: str w{{[0-9]+}}, [x{{[0-9]+}}], #16
entry:
%gep1 = getelementptr i32* %array, i64 2
br label %body
body:
%iv2 = phi i32* [ %gep3, %body ], [ %gep1, %entry ]
%iv = phi i64 [ %iv.next, %body ], [ %count, %entry ]
%gep2 = getelementptr i32* %iv2, i64 -1
%load = load i32* %gep2
call void @use-word(i32 %load)
store i32 %val, i32* %iv2
%iv.next = add i64 %iv, -4
%gep3 = getelementptr i32* %iv2, i64 4
%cond = icmp eq i64 %iv.next, 0
br i1 %cond, label %exit, label %body
exit:
ret void
}
define void @store-post-indexed-doubleword(i64* %array, i64 %count, i64 %val) nounwind {
; CHECK-LABEL: store-post-indexed-doubleword
; CHECK: str x{{[0-9]+}}, [x{{[0-9]+}}], #32
entry:
%gep1 = getelementptr i64* %array, i64 2
br label %body
body:
%iv2 = phi i64* [ %gep3, %body ], [ %gep1, %entry ]
%iv = phi i64 [ %iv.next, %body ], [ %count, %entry ]
%gep2 = getelementptr i64* %iv2, i64 -1
%load = load i64* %gep2
call void @use-doubleword(i64 %load)
store i64 %val, i64* %iv2
%iv.next = add i64 %iv, -4
%gep3 = getelementptr i64* %iv2, i64 4
%cond = icmp eq i64 %iv.next, 0
br i1 %cond, label %exit, label %body
exit:
ret void
}
define void @store-post-indexed-quadword(<2 x i64>* %array, i64 %count, <2 x i64> %val) nounwind {
; CHECK-LABEL: store-post-indexed-quadword
; CHECK: str q{{[0-9]+}}, [x{{[0-9]+}}], #64
entry:
%gep1 = getelementptr <2 x i64>* %array, i64 2
br label %body
body:
%iv2 = phi <2 x i64>* [ %gep3, %body ], [ %gep1, %entry ]
%iv = phi i64 [ %iv.next, %body ], [ %count, %entry ]
%gep2 = getelementptr <2 x i64>* %iv2, i64 -1
%load = load <2 x i64>* %gep2
call void @use-quadword(<2 x i64> %load)
store <2 x i64> %val, <2 x i64>* %iv2
%iv.next = add i64 %iv, -4
%gep3 = getelementptr <2 x i64>* %iv2, i64 4
%cond = icmp eq i64 %iv.next, 0
br i1 %cond, label %exit, label %body
exit:
ret void
}
define void @store-post-indexed-float(float* %array, i64 %count, float %val) nounwind {
; CHECK-LABEL: store-post-indexed-float
; CHECK: str s{{[0-9]+}}, [x{{[0-9]+}}], #16
entry:
%gep1 = getelementptr float* %array, i64 2
br label %body
body:
%iv2 = phi float* [ %gep3, %body ], [ %gep1, %entry ]
%iv = phi i64 [ %iv.next, %body ], [ %count, %entry ]
%gep2 = getelementptr float* %iv2, i64 -1
%load = load float* %gep2
call void @use-float(float %load)
store float %val, float* %iv2
%iv.next = add i64 %iv, -4
%gep3 = getelementptr float* %iv2, i64 4
%cond = icmp eq i64 %iv.next, 0
br i1 %cond, label %exit, label %body
exit:
ret void
}
define void @store-post-indexed-double(double* %array, i64 %count, double %val) nounwind {
; CHECK-LABEL: store-post-indexed-double
; CHECK: str d{{[0-9]+}}, [x{{[0-9]+}}], #32
entry:
%gep1 = getelementptr double* %array, i64 2
br label %body
body:
%iv2 = phi double* [ %gep3, %body ], [ %gep1, %entry ]
%iv = phi i64 [ %iv.next, %body ], [ %count, %entry ]
%gep2 = getelementptr double* %iv2, i64 -1
%load = load double* %gep2
call void @use-double(double %load)
store double %val, double* %iv2
%iv.next = add i64 %iv, -4
%gep3 = getelementptr double* %iv2, i64 4
%cond = icmp eq i64 %iv.next, 0
br i1 %cond, label %exit, label %body
exit:
ret void
}
declare void @use-word(i32)
declare void @use-doubleword(i64)
declare void @use-quadword(<2 x i64>)