[X86] Added SSE4.2 CRC32 memory folding patterns + tests

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234013 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 2292a548dde15a2c1bb55a3fb5e514aabf216bee..0154afebb44e3c65f94593c328a1e06e28903c07 100644 (file)
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -952,6 +952,8 @@ X86InstrInfo::X86InstrInfo(X86Subtarget &STI)
     { X86::CMPPSrri,        X86::CMPPSrmi,      TB_ALIGN_16 },
     { X86::CMPSDrr,         X86::CMPSDrm,       0 },
     { X86::CMPSSrr,         X86::CMPSSrm,       0 },
+    { X86::CRC32r32r32,     X86::CRC32r32m32,   0 },
+    { X86::CRC32r64r64,     X86::CRC32r64m64,   0 },
     { X86::DIVPDrr,         X86::DIVPDrm,       TB_ALIGN_16 },
     { X86::DIVPSrr,         X86::DIVPSrm,       TB_ALIGN_16 },
     { X86::DIVSDrr,         X86::DIVSDrm,       0 },

diff --git a/test/CodeGen/X86/stack-folding-int-sse42.ll b/test/CodeGen/X86/stack-folding-int-sse42.ll
index 7c3de917dce3693270dc1815feae40c4daa5aea4..e814ae6df50147a700b28bb324555d1582bf8704 100644 (file)
--- a/test/CodeGen/X86/stack-folding-int-sse42.ll
+++ b/test/CodeGen/X86/stack-folding-int-sse42.ll
@@ -62,6 +62,33 @@ define <2 x i64> @stack_fold_aeskeygenassist(<2 x i64> %a0) {
 }
 declare <2 x i64> @llvm.x86.aesni.aeskeygenassist(<2 x i64>, i8) nounwind readnone
 
+;TODO stack_fold_crc32_32_8
+declare i32 @llvm.x86.sse42.crc32.32.8(i32, i8) nounwind
+
+;TODO stack_fold_crc32_32_16
+declare i32 @llvm.x86.sse42.crc32.32.16(i32, i16) nounwind
+
+define i32 @stack_fold_crc32_32_32(i32 %a0, i32 %a1) {
+  ;CHECK-LABEL: stack_fold_crc32_32_32
+  ;CHECK:       crc32l {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
+  %1 = tail call <2 x i64> asm sideeffect "nop", "=x,~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = call i32 @llvm.x86.sse42.crc32.32.32(i32 %a0, i32 %a1)
+  ret i32 %2
+}
+declare i32 @llvm.x86.sse42.crc32.32.32(i32, i32) nounwind
+
+;TODO stack_fold_crc32_64_8
+declare i64 @llvm.x86.sse42.crc32.64.8(i64, i8) nounwind
+
+define i64 @stack_fold_crc32_64_64(i64 %a0, i64 %a1) {
+  ;CHECK-LABEL: stack_fold_crc32_64_64
+  ;CHECK:       crc32q {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload
+  %1 = tail call <2 x i64> asm sideeffect "nop", "=x,~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = call i64 @llvm.x86.sse42.crc32.64.64(i64 %a0, i64 %a1)
+  ret i64 %2
+}
+declare i64 @llvm.x86.sse42.crc32.64.64(i64, i64) nounwind
+
 define <4 x i32> @stack_fold_movd_load(i32 %a0) {
   ;CHECK-LABEL: stack_fold_movd_load
   ;CHECK:       movd {{-?[0-9]*}}(%rsp), {{%xmm[0-9][0-9]*}} {{.*#+}} 4-byte Folded Reload