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Add test case for merging of chained stores of mismatched type.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298293 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nirav Dave 2017-03-20 19:48:22 +00:00
parent 1ae32f1960
commit 653b4239a7
1 changed files with 48 additions and 0 deletions
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48
test/CodeGen/AArch64/pr27816.ll Normal file
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@ -0,0 +1,48 @@
; RUN: llc %s -mtriple=aarch64 -o - | FileCheck %s
%struct.A = type { i8, i8, i8, i8, i8, i8, i8, i8, i32 }
; The existence of the final i32 value should not prevent the i8s from
; being merged.
; CHECK-LABEL: @merge_const_store
; CHECK-NOT: strb
; CHECK: str x8, [x1]
; CHECK-NOT: strb
; CHECK: str wzr, [x1, #8]
; CHECK-NOT: strb
define void @merge_const_store(i32 %count, %struct.A* nocapture %p) {
%1 = icmp sgt i32 %count, 0
br i1 %1, label %.lr.ph, label %._crit_edge
.lr.ph:
%i.02 = phi i32 [ %add, %.lr.ph ], [ 0, %0 ]
%.01 = phi %struct.A* [ %addr, %.lr.ph ], [ %p, %0 ]
%a2 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 0
store i8 1, i8* %a2, align 1
%a3 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 1
store i8 2, i8* %a3, align 1
%a4 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 2
store i8 3, i8* %a4, align 1
%a5 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 3
store i8 4, i8* %a5, align 1
%a6 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 4
store i8 5, i8* %a6, align 1
%a7 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 5
store i8 6, i8* %a7, align 1
%a8 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 6
store i8 7, i8* %a8, align 1
%a9 = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 7
store i8 8, i8* %a9, align 1
;
%addr_last = getelementptr inbounds %struct.A, %struct.A* %.01, i64 0, i32 8
store i32 0, i32* %addr_last, align 4
%add = add nsw i32 %i.02, 1
%addr = getelementptr inbounds %struct.A, %struct.A* %.01, i64 1
%exitcond = icmp eq i32 %add, %count
br i1 %exitcond, label %._crit_edge, label %.lr.ph
._crit_edge:
ret void
}