[llvm] r300551 - Add store Merge test.
Nirav Dave via llvm-commits
llvm-commits at lists.llvm.org
Tue Apr 18 06:25:19 PDT 2017
Author: niravd
Date: Tue Apr 18 08:25:19 2017
New Revision: 300551
URL: http://llvm.org/viewvc/llvm-project?rev=300551&view=rev
Log:
Add store Merge test.
Modified:
llvm/trunk/test/CodeGen/X86/MergeConsecutiveStores.ll
Modified: llvm/trunk/test/CodeGen/X86/MergeConsecutiveStores.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/MergeConsecutiveStores.ll?rev=300551&r1=300550&r2=300551&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/MergeConsecutiveStores.ll (original)
+++ llvm/trunk/test/CodeGen/X86/MergeConsecutiveStores.ll Tue Apr 18 08:25:19 2017
@@ -582,3 +582,28 @@ define void @merge_vec_element_and_scala
; CHECK-NEXT: movq %rcx, 40(%rdi)
; 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
+ %p1 = getelementptr i8, i8* %p, i64 42
+ store i8 1, i8* %p1
+ %p2 = getelementptr i8, i8* %p, i64 2
+ store i8 2, i8* %p2
+ %p3 = getelementptr i8, i8* %p, i64 3
+ store i8 3, i8* %p3
+ ret void
+; CHECK-LABEL: almost_consecutive_stores
+; CHECK-DAG: movb $0, (%rdi)
+; CHECK-DAG: movb $1, 42(%rdi)
+; CHECK-DAG: movb $2, 2(%rdi)
+; CHECK-DAG: movb $3, 3(%rdi)
+; CHECK: retq
+
+; We should able to merge the final two stores into a 16-bit store
+; FIXMECHECK-DAG: movw $770, 2(%rdi)
+
+
+}
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