Resubmit "[X86] Adding new LLVM TableGen backend that generates the X86 backend memory folding tables."

This was reverted due to buildbot breakages and I was not familiar
with this code to investigate it.  But while trying to get a
useful backtrace for the author, it turns out the fix was very
obvious.  Resubmitting this patch as is, and will submit the
fix in a followup so that the fix is not hidden in the larger
CL.

llvm-svn: 304122

3 files changed, 16 insertions, 29 deletions

diff --git a/llvm/test/CodeGen/X86/sse42-intrinsics-fast-isel.ll b/llvm/test/CodeGen/X86/sse42-intrinsics-fast-isel.ll
index 383ab21bd40..19305d0dad6 100644
--- a/llvm/test/CodeGen/X86/sse42-intrinsics-fast-isel.ll
+++ b/llvm/test/CodeGen/X86/sse42-intrinsics-fast-isel.ll
@@ -354,9 +354,8 @@ declare i32 @llvm.x86.sse42.pcmpistriz128(<16 x i8>, <16 x i8>, i8) nounwind rea
 define i32 @test_mm_crc32_u8(i32 %a0, i8 %a1) {
 ; X32-LABEL: test_mm_crc32_u8:
 ; X32:       # BB#0:
-; X32-NEXT:    movb {{[0-9]+}}(%esp), %cl
 ; X32-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X32-NEXT:    crc32b %cl, %eax
+; X32-NEXT:    crc32b {{[0-9]+}}(%esp), %eax
 ; X32-NEXT:    retl
 ;
 ; X64-LABEL: test_mm_crc32_u8:
@@ -372,9 +371,8 @@ declare i32 @llvm.x86.sse42.crc32.32.8(i32, i8) nounwind readnone
 define i32 @test_mm_crc32_u16(i32 %a0, i16 %a1) {
 ; X32-LABEL: test_mm_crc32_u16:
 ; X32:       # BB#0:
-; X32-NEXT:    movzwl {{[0-9]+}}(%esp), %ecx
 ; X32-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X32-NEXT:    crc32w %cx, %eax
+; X32-NEXT:    crc32w {{[0-9]+}}(%esp), %eax
 ; X32-NEXT:    retl
 ;
 ; X64-LABEL: test_mm_crc32_u16:
diff --git a/llvm/test/CodeGen/X86/stack-folding-fp-avx1.ll b/llvm/test/CodeGen/X86/stack-folding-fp-avx1.ll
index 72542f49908..a00d47bb13e 100644
--- a/llvm/test/CodeGen/X86/stack-folding-fp-avx1.ll
+++ b/llvm/test/CodeGen/X86/stack-folding-fp-avx1.ll
@@ -1651,26 +1651,9 @@ define <8 x float> @stack_fold_sqrtps_ymm(<8 x float> %a0) {
 }
 declare <8 x float> @llvm.x86.avx.sqrt.ps.256(<8 x float>) nounwind readnone
 
-define double @stack_fold_sqrtsd(double %a0) {
-  ;CHECK-LABEL: stack_fold_sqrtsd
-  ;CHECK:       vsqrtsd {{-?[0-9]*}}(%rsp), {{%xmm[0-9][0-9]*}}, {{%xmm[0-9][0-9]*}} {{.*#+}} 8-byte Folded Reload
-  %1 = tail call <2 x i64> asm sideeffect "nop", "=x,~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{xmm8},~{xmm9},~{xmm10},~{xmm11},~{xmm12},~{xmm13},~{xmm14},~{xmm15},~{flags}"()
-  %2 = call double @llvm.sqrt.f64(double %a0)
-  ret double %2
-}
-declare double @llvm.sqrt.f64(double) nounwind readnone
-
+; TODO stack_fold_sqrtsd
 ; TODO stack_fold_sqrtsd_int
-
-define float @stack_fold_sqrtss(float %a0) {
-  ;CHECK-LABEL: stack_fold_sqrtss
-  ;CHECK:       vsqrtss {{-?[0-9]*}}(%rsp), {{%xmm[0-9][0-9]*}}, {{%xmm[0-9][0-9]*}} {{.*#+}} 4-byte Folded Reload
-  %1 = tail call <2 x i64> asm sideeffect "nop", "=x,~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{xmm8},~{xmm9},~{xmm10},~{xmm11},~{xmm12},~{xmm13},~{xmm14},~{xmm15},~{flags}"()
-  %2 = call float @llvm.sqrt.f32(float %a0)
-  ret float %2
-}
-declare float @llvm.sqrt.f32(float) nounwind readnone
-
+; TODO stack_fold_sqrtss
 ; TODO stack_fold_sqrtss_int
 
 define <2 x double> @stack_fold_subpd(<2 x double> %a0, <2 x double> %a1) {
diff --git a/llvm/test/CodeGen/X86/vector-sqrt.ll b/llvm/test/CodeGen/X86/vector-sqrt.ll
index c5ac4466b5f..13088b7fa5f 100644
--- a/llvm/test/CodeGen/X86/vector-sqrt.ll
+++ b/llvm/test/CodeGen/X86/vector-sqrt.ll
@@ -5,8 +5,10 @@
 define <2 x double> @sqrtd2(double* nocapture readonly %v) local_unnamed_addr #0 {
 ; CHECK-LABEL: sqrtd2:
 ; CHECK:       # BB#0: # %entry
-; CHECK-NEXT:    vsqrtsd (%rdi), %xmm0, %xmm0
-; CHECK-NEXT:    vsqrtsd 8(%rdi), %xmm1, %xmm1
+; CHECK-NEXT:    vmovsd {{.*#+}} xmm0 = mem[0],zero
+; CHECK-NEXT:    vmovsd {{.*#+}} xmm1 = mem[0],zero
+; CHECK-NEXT:    vsqrtsd %xmm0, %xmm0, %xmm0
+; CHECK-NEXT:    vsqrtsd %xmm1, %xmm1, %xmm1
 ; CHECK-NEXT:    vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; CHECK-NEXT:    retq
 entry:
@@ -27,10 +29,14 @@ declare double @sqrt(double) local_unnamed_addr #1
 define <4 x float> @sqrtf4(float* nocapture readonly %v) local_unnamed_addr #0 {
 ; CHECK-LABEL: sqrtf4:
 ; CHECK:       # BB#0: # %entry
-; CHECK-NEXT:    vsqrtss (%rdi), %xmm0, %xmm0
-; CHECK-NEXT:    vsqrtss 4(%rdi), %xmm1, %xmm1
-; CHECK-NEXT:    vsqrtss 8(%rdi), %xmm2, %xmm2
-; CHECK-NEXT:    vsqrtss 12(%rdi), %xmm3, %xmm3
+; CHECK-NEXT:    vmovss {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; CHECK-NEXT:    vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; CHECK-NEXT:    vsqrtss %xmm0, %xmm0, %xmm0
+; CHECK-NEXT:    vsqrtss %xmm1, %xmm1, %xmm1
+; CHECK-NEXT:    vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; CHECK-NEXT:    vsqrtss %xmm2, %xmm2, %xmm2
+; CHECK-NEXT:    vmovss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; CHECK-NEXT:    vsqrtss %xmm3, %xmm3, %xmm3
 ; CHECK-NEXT:    vinsertps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[2,3]
 ; CHECK-NEXT:    vinsertps {{.*#+}} xmm0 = xmm0[0,1],xmm2[0],xmm0[3]
 ; CHECK-NEXT:    vinsertps {{.*#+}} xmm0 = xmm0[0,1,2],xmm3[0]