Test that the X86 backend is only emitting one fucom instruction

for each 'COM =' line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14147 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/compare_folding.llx b/test/CodeGen/X86/compare_folding.llx
new file mode 100644 (file)
index 0000000..3d8e6c7
--- /dev/null
+++ b/test/CodeGen/X86/compare_folding.llx
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep com | wc -l > %t2
+; RUN: grep 'COM =' %s | grep -v grep | wc -l > %t1
+; RUN: diff %t1 %t2
+declare bool %llvm.isnan(double)
+
+bool %test1(double %X, double %Y) {  ;; Returns isunordered(X,Y)
+       %a = call bool %llvm.isnan(double %X)
+       %b = call bool %llvm.isnan(double %Y)
+       %COM = or bool %a, %b
+       ret bool %COM
+}