R600/SI: Remove v_sub_f64 pseudo
The expansion code does the same thing. Since
the operands were not defined with the correct
types, this has the side effect of fixing operand
folding since the expanded pseudo would never use
SGPRs or inline immediates.
llvm-svn: 230072
diff --git a/llvm/test/CodeGen/R600/fneg.f64.ll b/llvm/test/CodeGen/R600/fneg.f64.ll
index 9ea189c..aa6df20 100644
--- a/llvm/test/CodeGen/R600/fneg.f64.ll
+++ b/llvm/test/CodeGen/R600/fneg.f64.ll
@@ -39,8 +39,7 @@
; unless the target returns true for isNegFree()
; FUNC-LABEL: {{^}}fneg_free_f64:
-; FIXME: Unnecessary copy to VGPRs
-; GCN: v_add_f64 {{v\[[0-9]+:[0-9]+\]}}, {{v\[[0-9]+:[0-9]+\]}}, -{{v\[[0-9]+:[0-9]+\]$}}
+; GCN: v_add_f64 {{v\[[0-9]+:[0-9]+\]}}, 0, -{{s\[[0-9]+:[0-9]+\]$}}
define void @fneg_free_f64(double addrspace(1)* %out, i64 %in) {
%bc = bitcast i64 %in to double
%fsub = fsub double 0.0, %bc