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Add bitcast store-merge test.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nirav Dave 2017-06-23 20:52:14 +00:00
parent 93ca10c6fc
commit 309f49b92a
1 changed files with 29 additions and 2 deletions
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31
test/CodeGen/X86/MergeConsecutiveStores.ll
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@ -583,8 +583,6 @@ define void @merge_vec_element_and_scalar_load([6 x i64]* %array) {
; CHECK-NEXT: retq
}
; Don't let a non-consecutive store thwart merging of the last two.
define void @almost_consecutive_stores(i8* %p) {
store i8 0, i8* %p
@ -601,3 +599,32 @@ define void @almost_consecutive_stores(i8* %p) {
; CHECK-DAG: movw $770, 2(%rdi)
; CHECK: retq
}
; We should be able to merge these.
define void @merge_bitcast(<4 x i32> %v, float* %ptr) {
%fv = bitcast <4 x i32> %v to <4 x float>
%vecext1 = extractelement <4 x i32> %v, i32 1
%vecext2 = extractelement <4 x i32> %v, i32 2
%vecext3 = extractelement <4 x i32> %v, i32 3
%f0 = extractelement <4 x float> %fv, i32 0
%f1 = bitcast i32 %vecext1 to float
%f2 = bitcast i32 %vecext2 to float
%f3 = bitcast i32 %vecext3 to float
%idx0 = getelementptr inbounds float, float* %ptr, i64 0
%idx1 = getelementptr inbounds float, float* %ptr, i64 1
%idx2 = getelementptr inbounds float, float* %ptr, i64 2
%idx3 = getelementptr inbounds float, float* %ptr, i64 3
store float %f0, float* %idx0, align 4
store float %f1, float* %idx1, align 4
store float %f2, float* %idx2, align 4
store float %f3, float* %idx3, align 4
ret void
; CHECK-LABEL: merge_bitcast
; CHECK: vmovd %xmm0, (%rdi)
; CHECK-NEXT: vpextrd $1, %xmm0, 4(%rdi)
; CHECK-NEXT: vpextrd $2, %xmm0, 8(%rdi)
; CHECK-NEXT: vpextrd $3, %xmm0, 12(%rdi)
; CHECK-NEXT: retq
}