[llvm] r268533 - [x86] add tests to show current codegen for obscured fneg/fabs
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Wed May 4 12:06:03 PDT 2016
Author: spatel
Date: Wed May 4 14:06:03 2016
New Revision: 268533
URL: http://llvm.org/viewvc/llvm-project?rev=268533&view=rev
Log:
[x86] add tests to show current codegen for obscured fneg/fabs
Modified:
llvm/trunk/test/CodeGen/X86/fp-logic.ll
Modified: llvm/trunk/test/CodeGen/X86/fp-logic.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/fp-logic.ll?rev=268533&r1=268532&r2=268533&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/fp-logic.ll (original)
+++ llvm/trunk/test/CodeGen/X86/fp-logic.ll Wed May 4 14:06:03 2016
@@ -262,3 +262,53 @@ define float @movmsk(float %x) {
ret float %bc2
}
+define double @bitcast_fabs(double %x) {
+; CHECK-LABEL: bitcast_fabs:
+; CHECK: # BB#0:
+; CHECK-NEXT: movsd {{.*#+}} xmm1 = mem[0],zero
+; CHECK-NEXT: andpd %xmm1, %xmm0
+; CHECK-NEXT: retq
+;
+ %bc1 = bitcast double %x to i64
+ %and = and i64 %bc1, 9223372036854775807
+ %bc2 = bitcast i64 %and to double
+ ret double %bc2
+}
+
+define float @bitcast_fneg(float %x) {
+; CHECK-LABEL: bitcast_fneg:
+; CHECK: # BB#0:
+; CHECK-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; CHECK-NEXT: xorps %xmm1, %xmm0
+; CHECK-NEXT: retq
+;
+ %bc1 = bitcast float %x to i32
+ %xor = xor i32 %bc1, 2147483648
+ %bc2 = bitcast i32 %xor to float
+ ret float %bc2
+}
+
+define <2 x double> @bitcast_fabs_vec(<2 x double> %x) {
+; CHECK-LABEL: bitcast_fabs_vec:
+; CHECK: # BB#0:
+; CHECK-NEXT: andps {{.*}}(%rip), %xmm0
+; CHECK-NEXT: retq
+;
+ %bc1 = bitcast <2 x double> %x to <2 x i64>
+ %and = and <2 x i64> %bc1, <i64 9223372036854775807, i64 9223372036854775807>
+ %bc2 = bitcast <2 x i64> %and to <2 x double>
+ ret <2 x double> %bc2
+}
+
+define <4 x float> @bitcast_fneg_vec(<4 x float> %x) {
+; CHECK-LABEL: bitcast_fneg_vec:
+; CHECK: # BB#0:
+; CHECK-NEXT: xorps {{.*}}(%rip), %xmm0
+; CHECK-NEXT: retq
+;
+ %bc1 = bitcast <4 x float> %x to <4 x i32>
+ %xor = xor <4 x i32> %bc1, <i32 2147483648, i32 2147483648, i32 2147483648, i32 2147483648>
+ %bc2 = bitcast <4 x i32> %xor to <4 x float>
+ ret <4 x float> %bc2
+}
+
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