[IR] Add a dedicated FNeg IR Instruction
The IEEE-754 Standard makes it clear that fneg(x) and
fsub(-0.0, x) are two different operations. The former is a bitwise
operation, while the latter is an arithmetic operation. This patch
creates a dedicated FNeg IR Instruction to model that behavior.
Differential Revision: https://reviews.llvm.org/D53877
llvm-svn: 346774
diff --git a/llvm/test/Bitcode/function-encoding-rel-operands.ll b/llvm/test/Bitcode/function-encoding-rel-operands.ll
index 1307dd4..9486e04 100644
--- a/llvm/test/Bitcode/function-encoding-rel-operands.ll
+++ b/llvm/test/Bitcode/function-encoding-rel-operands.ll
@@ -4,6 +4,15 @@
; RUN: verify-uselistorder < %s
; CHECK: FUNCTION_BLOCK
+; CHECK: INST_UNOP {{.*}}op0=1
+; CHECK: INST_RET {{.*}}op0=1
+define double @test_float_unops(double %a) nounwind {
+ %1 = fneg double %a
+ ret double %1
+}
+
+
+; CHECK: FUNCTION_BLOCK
; CHECK: INST_BINOP {{.*}}op0=1 op1=1
; CHECK: INST_BINOP {{.*}}op0=1 op1=1
; CHECK: INST_BINOP {{.*}}op0=1 op1=1