[X86] Add tests for funnel undef argument combines
If one of the shifted arguments is undef we should be folding to a regular shift.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353628 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/funnel-shift.ll b/test/CodeGen/X86/funnel-shift.ll
index 9feab00..ade636b 100644
--- a/test/CodeGen/X86/funnel-shift.ll
+++ b/test/CodeGen/X86/funnel-shift.ll
@@ -358,6 +358,144 @@
ret i32 %res
}
+; undef handling
+
+define i32 @fshl_i32_undef0(i32 %a0, i32 %a1) nounwind {
+; X32-SSE2-LABEL: fshl_i32_undef0:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shldl %cl, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshl_i32_undef0:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %esi, %ecx
+; X64-AVX2-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-AVX2-NEXT: shldl %cl, %edi, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshl.i32(i32 undef, i32 %a0, i32 %a1)
+ ret i32 %res
+}
+
+define i32 @fshl_i32_undef0_cst(i32 %a0) nounwind {
+; X32-SSE2-LABEL: fshl_i32_undef0_cst:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shldl $9, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshl_i32_undef0_cst:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: shldl $9, %edi, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshl.i32(i32 undef, i32 %a0, i32 9)
+ ret i32 %res
+}
+
+define i32 @fshl_i32_undef1(i32 %a0, i32 %a1) nounwind {
+; X32-SSE2-LABEL: fshl_i32_undef1:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shldl %cl, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshl_i32_undef1:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %esi, %ecx
+; X64-AVX2-NEXT: movl %edi, %eax
+; X64-AVX2-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-AVX2-NEXT: shldl %cl, %eax, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshl.i32(i32 %a0, i32 undef, i32 %a1)
+ ret i32 %res
+}
+
+define i32 @fshl_i32_undef1_cst(i32 %a0) nounwind {
+; X32-SSE2-LABEL: fshl_i32_undef1_cst:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shldl $9, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshl_i32_undef1_cst:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %edi, %eax
+; X64-AVX2-NEXT: shldl $9, %eax, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshl.i32(i32 %a0, i32 undef, i32 9)
+ ret i32 %res
+}
+
+define i32 @fshr_i32_undef0(i32 %a0, i32 %a1) nounwind {
+; X32-SSE2-LABEL: fshr_i32_undef0:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shrdl %cl, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshr_i32_undef0:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %esi, %ecx
+; X64-AVX2-NEXT: movl %edi, %eax
+; X64-AVX2-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-AVX2-NEXT: shrdl %cl, %eax, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshr.i32(i32 undef, i32 %a0, i32 %a1)
+ ret i32 %res
+}
+
+define i32 @fshr_i32_undef0_cst(i32 %a0) nounwind {
+; X32-SSE2-LABEL: fshr_i32_undef0_cst:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shrdl $9, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshr_i32_undef0_cst:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %edi, %eax
+; X64-AVX2-NEXT: shrdl $9, %eax, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshr.i32(i32 undef, i32 %a0, i32 9)
+ ret i32 %res
+}
+
+define i32 @fshr_i32_undef1(i32 %a0, i32 %a1) nounwind {
+; X32-SSE2-LABEL: fshr_i32_undef1:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shrdl %cl, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshr_i32_undef1:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: movl %esi, %ecx
+; X64-AVX2-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-AVX2-NEXT: shrdl %cl, %edi, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshr.i32(i32 %a0, i32 undef, i32 %a1)
+ ret i32 %res
+}
+
+define i32 @fshr_i32_undef1_cst(i32 %a0) nounwind {
+; X32-SSE2-LABEL: fshr_i32_undef1_cst:
+; X32-SSE2: # %bb.0:
+; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X32-SSE2-NEXT: shrdl $9, %eax, %eax
+; X32-SSE2-NEXT: retl
+;
+; X64-AVX2-LABEL: fshr_i32_undef1_cst:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: shrdl $9, %edi, %eax
+; X64-AVX2-NEXT: retq
+ %res = call i32 @llvm.fshr.i32(i32 %a0, i32 undef, i32 9)
+ ret i32 %res
+}
+
; With constant shift amount, this is 'shrd' or 'shld'.
define i32 @fshr_i32_const_shift(i32 %x, i32 %y) nounwind {
