Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123015 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/memcpy-2.ll b/test/CodeGen/X86/memcpy-2.ll
index 9078e4b..17cd8e8 100644
--- a/test/CodeGen/X86/memcpy-2.ll
+++ b/test/CodeGen/X86/memcpy-2.ll
@@ -1,4 +1,5 @@
; RUN: llc < %s -mattr=+sse2 -mtriple=i686-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=SSE2
+; RUN: llc < %s -mattr=+sse,-sse2 -mtriple=i686-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=SSE1
; RUN: llc < %s -mattr=-sse -mtriple=i686-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=NOSSE
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=X86-64
@@ -14,6 +15,13 @@
; SSE2: movl $0
; SSE2: movl $0
+; SSE1: t1:
+; SSE1: movaps _.str, %xmm0
+; SSE1: movaps %xmm0
+; SSE1: movb $0
+; SSE1: movl $0
+; SSE1: movl $0
+
; NOSSE: t1:
; NOSSE: movb $0
; NOSSE: movl $0
@@ -43,6 +51,10 @@
; SSE2: movaps (%eax), %xmm0
; SSE2: movaps %xmm0, (%eax)
+; SSE1: t2:
+; SSE1: movaps (%eax), %xmm0
+; SSE1: movaps %xmm0, (%eax)
+
; NOSSE: t2:
; NOSSE: movl
; NOSSE: movl
@@ -67,8 +79,22 @@
define void @t3(%struct.s0* nocapture %a, %struct.s0* nocapture %b) nounwind ssp {
entry:
; SSE2: t3:
-; SSE2: movups (%eax), %xmm0
-; SSE2: movups %xmm0, (%eax)
+; SSE2: movsd (%eax), %xmm0
+; SSE2: movsd 8(%eax), %xmm1
+; SSE2: movsd %xmm1, 8(%eax)
+; SSE2: movsd %xmm0, (%eax)
+
+; SSE1: t3:
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
+; SSE1: movl
; NOSSE: t3:
; NOSSE: movl
@@ -83,8 +109,10 @@
; NOSSE: movl
; X86-64: t3:
-; X86-64: movups (%rsi), %xmm0
-; X86-64: movups %xmm0, (%rdi)
+; X86-64: movq (%rsi), %rax
+; X86-64: movq 8(%rsi), %rcx
+; X86-64: movq %rcx, 8(%rdi)
+; X86-64: movq %rax, (%rdi)
%tmp2 = bitcast %struct.s0* %a to i8* ; <i8*> [#uses=1]
%tmp3 = bitcast %struct.s0* %b to i8* ; <i8*> [#uses=1]
tail call void @llvm.memcpy.i32(i8* %tmp2, i8* %tmp3, i32 16, i32 8)
@@ -94,12 +122,24 @@
define void @t4() nounwind {
entry:
; SSE2: t4:
-; SSE2: movups _.str2, %xmm0
-; SSE2: movaps %xmm0, (%esp)
-; SSE2: movw $120, 28(%esp)
+; SSE2: movw $120
; SSE2: movl $2021161080
; SSE2: movl $2021161080
; SSE2: movl $2021161080
+; SSE2: movl $2021161080
+; SSE2: movl $2021161080
+; SSE2: movl $2021161080
+; SSE2: movl $2021161080
+
+; SSE1: t4:
+; SSE1: movw $120
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
+; SSE1: movl $2021161080
; NOSSE: t4:
; NOSSE: movw $120
@@ -114,8 +154,8 @@
; X86-64: t4:
; X86-64: movabsq $8680820740569200760, %rax
; X86-64: movq %rax
-; X86-64: movups _.str2(%rip), %xmm0
-; X86-64: movaps %xmm0, -40(%rsp)
+; X86-64: movq %rax
+; X86-64: movq %rax
; X86-64: movw $120
; X86-64: movl $2021161080
%tmp1 = alloca [30 x i8]