Subzero: Fix some issues related to legalization and undef handling.

tests_lit/llvm2ice_tests/undef.ll

 ; This test checks that undef values are represented as zero.
 
 ; RUN: %llvm2ice --verbose none %s | FileCheck  %s
 ; RUN: %llvm2ice -O2 --verbose none %s | FileCheck  %s
+; RUN: %llvm2ice -mattr=sse4.1 --verbose none %s | FileCheck  %s
+; RUN: %llvm2ice -mattr=sse4.1 -O2 --verbose none %s | FileCheck  %s
 ; RUN: %llvm2ice -O2 --verbose none %s \
 ; RUN:               | llvm-mc -arch=x86 -x86-asm-syntax=intel -filetype=obj
 ; RUN: %llvm2ice -Om1 --verbose none %s \
 ; RUN:               | llvm-mc -arch=x86 -x86-asm-syntax=intel -filetype=obj
+; RUN: %llvm2ice -mattr=sse4.1 -O2 --verbose none %s \
+; RUN:               | llvm-mc -arch=x86 -x86-asm-syntax=intel -filetype=obj
+; RUN: %llvm2ice -mattr=sse4.1 -Om1 --verbose none %s \
+; RUN:               | llvm-mc -arch=x86 -x86-asm-syntax=intel -filetype=obj
 ; RUN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
 ; RUN: %llvm2iceinsts %s | %szdiff %s | FileCheck --check-prefix=DUMP %s
 ; RUN: %llvm2iceinsts --pnacl %s | %szdiff %s \
 ; RUN:                           | FileCheck --check-prefix=DUMP %s
 
 define i32 @undef_i32() {
 entry:
   ret i32 undef
 ; CHECK-LABEL: undef_i32:
 ; CHECK: mov eax, 0
-; CHECK: ret
 }
 
 define i64 @undef_i64() {
 entry:
   ret i64 undef
 ; CHECK-LABEL: undef_i64:
 ; CHECK-DAG: mov eax, 0
 ; CHECK-DAG: mov edx, 0
 ; CHECK: ret
 }
 
 define float @undef_float() {
 entry:
   ret float undef
 ; CHECK-LABEL: undef_float:
 ; CHECK-NOT: sub esp
 ; CHECK: fld
-; CHECK: ret
 }
 
 define <4 x i1> @undef_v4i1() {
 entry:
   ret <4 x i1> undef
 ; CHECK-LABEL: undef_v4i1:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <8 x i1> @undef_v8i1() {
 entry:
   ret <8 x i1> undef
 ; CHECK-LABEL: undef_v8i1:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <16 x i1> @undef_v16i1() {
 entry:
   ret <16 x i1> undef
 ; CHECK-LABEL: undef_v16i1:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <16 x i8> @undef_v16i8() {
 entry:
   ret <16 x i8> undef
 ; CHECK-LABEL: undef_v16i8:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <8 x i16> @undef_v8i16() {
 entry:
   ret <8 x i16> undef
 ; CHECK-LABEL: undef_v8i16:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <4 x i32> @undef_v4i32() {
 entry:
   ret <4 x i32> undef
 ; CHECK-LABEL: undef_v4i32:
 ; CHECK: pxor
-; CHECK: ret
 }
 
 define <4 x float> @undef_v4f32() {
 entry:
   ret <4 x float> undef
 ; CHECK-LABEL: undef_v4f32:
 ; CHECK: pxor
-; CHECK: ret
+}
+
+define <4 x i32> @vector_arith(<4 x i32> %arg) {
+entry:
+  %val = add <4 x i32> undef, %arg
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_arith:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_bitcast() {
+entry:
+  %val = bitcast <4 x i32> undef to <4 x float>
+  ret <4 x float> %val
+; CHECK-LABEL: vector_bitcast:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_sext() {
+entry:
+  %val = sext <4 x i1> undef to <4 x i32>
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_sext:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_zext() {
+entry:
+  %val = zext <4 x i1> undef to <4 x i32>
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_zext:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_trunc() {
+entry:
+  %val = trunc <4 x i32> undef to <4 x i1>
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_trunc:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_icmp(<4 x i32> %arg) {
+entry:
+  %val = icmp eq <4 x i32> undef, %arg
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_icmp:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_fcmp(<4 x float> %arg) {
+entry:
+  %val = fcmp ueq <4 x float> undef, %arg
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_fcmp:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_fptosi() {
+entry:
+  %val = fptosi <4 x float> undef to <4 x i32>
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_fptosi:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_fptoui() {
+entry:
+  %val = fptoui <4 x float> undef to <4 x i32>
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_fptoui:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_sitofp() {
+entry:
+  %val = sitofp <4 x i32> undef to <4 x float>
+  ret <4 x float> %val
+; CHECK-LABEL: vector_sitofp:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_uitofp() {
+entry:
+  %val = uitofp <4 x i32> undef to <4 x float>
+  ret <4 x float> %val
+; CHECK-LABEL: vector_uitofp:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_insertelement_arg1() {
+entry:
+  %val = insertelement <4 x float> undef, float 1.0, i32 0
+  ret <4 x float> %val
+; CHECK-LABEL: vector_insertelement_arg1:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_insertelement_arg2(<4 x float> %arg) {
+entry:
+  %val = insertelement <4 x float> %arg, float undef, i32 0
+  ret <4 x float> %val
+; CHECK-LABEL: vector_insertelement_arg2:
+; CHECK: [L$float$
+}
+
+define float @vector_extractelement_v4f32_index_0() {
+entry:
+  %val = extractelement <4 x float> undef, i32 0
+  ret float %val
+; CHECK-LABEL: vector_extractelement_v4f32_index_0:
+; CHECK: pxor
+}
+
+define float @vector_extractelement_v4f32_index_1() {
+entry:
+  %val = extractelement <4 x float> undef, i32 1
+  ret float %val
+; CHECK-LABEL: vector_extractelement_v4f32_index_1:
+; CHECK: pxor
+}
+
+define i32 @vector_extractelement_v16i1_index_7() {
+entry:
+  %val.trunc = extractelement <16 x i1> undef, i32 7
+  %val = sext i1 %val.trunc to i32
+  ret i32 %val
+; CHECK-LABEL: vector_extractelement_v16i1_index_7:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_select_v4i32_cond(<4 x i32> %a, <4 x i32> %b) {
+entry:
+  %val = select <4 x i1> undef, <4 x i32> %a, <4 x i32> %b
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_select_v4i32_cond:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_select_v4i32_arg1(<4 x i1> %cond, <4 x i32> %b) {
+entry:
+  %val = select <4 x i1> %cond, <4 x i32> undef, <4 x i32> %b
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_select_v4i32_arg1:
+; CHECK: pxor
+}
+
+define <4 x i32> @vector_select_v4i32_arg2(<4 x i1> %cond, <4 x i32> %a) {
+entry:
+  %val = select <4 x i1> %cond, <4 x i32> %a, <4 x i32> undef
+  ret <4 x i32> %val
+; CHECK-LABEL: vector_select_v4i32_arg2:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_select_v4i1_cond(<4 x i1> %a, <4 x i1> %b) {
+entry:
+  %val = select <4 x i1> undef, <4 x i1> %a, <4 x i1> %b
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_select_v4i1_cond:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_select_v4i1_arg1(<4 x i1> %cond, <4 x i1> %b) {
+entry:
+  %val = select <4 x i1> %cond, <4 x i1> undef, <4 x i1> %b
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_select_v4i1_arg1:
+; CHECK: pxor
+}
+
+define <4 x i1> @vector_select_v4i1_arg2(<4 x i1> %cond, <4 x i1> %a) {
+entry:
+  %val = select <4 x i1> %cond, <4 x i1> %a, <4 x i1> undef
+  ret <4 x i1> %val
+; CHECK-LABEL: vector_select_v4i1_arg2:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_select_v4f32_cond(<4 x float> %a, <4 x float> %b) {
+entry:
+  %val = select <4 x i1> undef, <4 x float> %a, <4 x float> %b
+  ret <4 x float> %val
+; CHECK-LABEL: vector_select_v4f32_cond:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_select_v4f32_arg1(<4 x i1> %cond, <4 x float> %b) {
+entry:
+  %val = select <4 x i1> %cond, <4 x float> undef, <4 x float> %b
+  ret <4 x float> %val
+; CHECK-LABEL: vector_select_v4f32_arg1:
+; CHECK: pxor
+}
+
+define <4 x float> @vector_select_v4f32_arg2(<4 x i1> %cond, <4 x float> %a) {
+entry:
+  %val = select <4 x i1> %cond, <4 x float> %a, <4 x float> undef
+  ret <4 x float> %val
+; CHECK-LABEL: vector_select_v4f32_arg2:
+; CHECK: pxor
 }
 
 ; ERRORS-NOT: ICE translation error
 ; DUMP-NOT: SZ