[X86] Add scalar undef sdiv/srem/udiv/urem combine tests

llvm-svn: 321823

llvm/test/CodeGen/X86/combine-sdiv.ll

@@ -4,6 +4,15 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=CHECK --check-prefix=AVX --check-prefix=AVX2
 
 ; fold (sdiv undef, x) -> 0
+define i32 @combine_sdiv_undef0(i32 %x) {
+; CHECK-LABEL: combine_sdiv_undef0:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    retq
+  %1 = sdiv i32 undef, %x
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_sdiv_undef0(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_sdiv_undef0:
 ; CHECK:       # %bb.0:
@@ -13,6 +22,14 @@ define <4 x i32> @combine_vec_sdiv_undef0(<4 x i32> %x) {
 }
 
 ; fold (sdiv x, undef) -> undef
+define i32 @combine_sdiv_undef1(i32 %x) {
+; CHECK-LABEL: combine_sdiv_undef1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    retq
+  %1 = sdiv i32 %x, undef
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_sdiv_undef1(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_sdiv_undef1:
 ; CHECK:       # %bb.0:
@@ -22,6 +39,15 @@ define <4 x i32> @combine_vec_sdiv_undef1(<4 x i32> %x) {
 }
 
 ; fold (sdiv x, 1) -> x
+define i32 @combine_sdiv_by_one(i32 %x) {
+; CHECK-LABEL: combine_sdiv_by_one:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    retq
+  %1 = sdiv i32 %x, 1
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_sdiv_by_one(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_sdiv_by_one:
 ; CHECK:       # %bb.0:
@@ -31,6 +57,16 @@ define <4 x i32> @combine_vec_sdiv_by_one(<4 x i32> %x) {
 }
 
 ; fold (sdiv x, -1) -> 0 - x
+define i32 @combine_sdiv_by_negone(i32 %x) {
+; CHECK-LABEL: combine_sdiv_by_negone:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    negl %edi
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    retq
+  %1 = sdiv i32 %x, -1
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_sdiv_by_negone(<4 x i32> %x) {
 ; SSE-LABEL: combine_vec_sdiv_by_negone:
 ; SSE:       # %bb.0:

llvm/test/CodeGen/X86/combine-srem.ll

@@ -4,6 +4,15 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=CHECK --check-prefix=AVX --check-prefix=AVX2
 
 ; fold (srem undef, x) -> 0
+define i32 @combine_srem_undef0(i32 %x) {
+; CHECK-LABEL: combine_srem_undef0:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    retq
+  %1 = srem i32 undef, %x
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_srem_undef0(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_srem_undef0:
 ; CHECK:       # %bb.0:
@@ -13,6 +22,14 @@ define <4 x i32> @combine_vec_srem_undef0(<4 x i32> %x) {
 }
 
 ; fold (srem x, undef) -> undef
+define i32 @combine_srem_undef1(i32 %x) {
+; CHECK-LABEL: combine_srem_undef1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    retq
+  %1 = srem i32 %x, undef
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_srem_undef1(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_srem_undef1:
 ; CHECK:       # %bb.0:

llvm/test/CodeGen/X86/combine-udiv.ll

@@ -4,6 +4,15 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=CHECK --check-prefix=AVX --check-prefix=AVX2
 
 ; fold (udiv undef, x) -> 0
+define i32 @combine_udiv_undef0(i32 %x) {
+; CHECK-LABEL: combine_udiv_undef0:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    retq
+  %1 = udiv i32 undef, %x
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_udiv_undef0(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_udiv_undef0:
 ; CHECK:       # %bb.0:
@@ -13,6 +22,14 @@ define <4 x i32> @combine_vec_udiv_undef0(<4 x i32> %x) {
 }
 
 ; fold (udiv x, undef) -> undef
+define i32 @combine_udiv_undef1(i32 %x) {
+; CHECK-LABEL: combine_udiv_undef1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    retq
+  %1 = udiv i32 %x, undef
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_udiv_undef1(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_udiv_undef1:
 ; CHECK:       # %bb.0:

llvm/test/CodeGen/X86/combine-urem.ll

@@ -4,6 +4,15 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=CHECK --check-prefix=AVX --check-prefix=AVX2
 
 ; fold (urem undef, x) -> 0
+define i32 @combine_urem_undef0(i32 %x) {
+; CHECK-LABEL: combine_urem_undef0:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    retq
+  %1 = urem i32 undef, %x
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_urem_undef0(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_urem_undef0:
 ; CHECK:       # %bb.0:
@@ -13,6 +22,14 @@ define <4 x i32> @combine_vec_urem_undef0(<4 x i32> %x) {
 }
 
 ; fold (urem x, undef) -> undef
+define i32 @combine_urem_undef1(i32 %x) {
+; CHECK-LABEL: combine_urem_undef1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    retq
+  %1 = urem i32 %x, undef
+  ret i32 %1
+}
+
 define <4 x i32> @combine_vec_urem_undef1(<4 x i32> %x) {
 ; CHECK-LABEL: combine_vec_urem_undef1:
 ; CHECK:       # %bb.0: