Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/CodeGen/Hexagon/opt-fneg.ll

@@ -0,0 +1,26 @@
+; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s
+; Optimize fneg to togglebit in V5.
+
+define float @foo(float %x) nounwind {
+entry:
+; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
+  %x.addr = alloca float, align 4
+  store float %x, float* %x.addr, align 4
+  %0 = load float, float* %x.addr, align 4
+  %sub = fsub float -0.000000e+00, %0
+  ret float %sub
+}
+
+define float @bar(float %x) nounwind {
+entry:
+; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
+  %sub = fsub float -0.000000e+00, %x
+  ret float %sub
+}
+
+define float @baz(float %x) nounwind {
+entry:
+; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
+  %conv1 = fmul float %x, -1.000000e+00
+  ret float %conv1
+}