1 files changed, 32 insertions, 0 deletions
diff --git a/test/CodeGen/X86/float-conv-elim.ll b/test/CodeGen/X86/float-conv-elim.ll
new file mode 100644
index 0000000..3feff85
--- /dev/null
+++ b/test/CodeGen/X86/float-conv-elim.ll
@@ -0,0 +1,32 @@
+; RUN: llc -march=x86-64 -mcpu=x86-64 < %s | FileCheck %s
+
+; Make sure the float conversion is folded away as it should be.
+; CHECK-LABEL: foo
+; CHECK-NOT: cvt
+; CHECK: movzbl
+define i32 @foo(i8 %a) #0 {
+  %conv = uitofp i8 %a to float
+  %conv1 = fptosi float %conv to i32
+  ret i32 %conv1
+}
+
+; CHECK-LABEL: foo2
+; CHECK-NOT: cvt
+; CHECK: movsbl
+define i32 @foo2(i8 %a) #0 {
+  %conv = sitofp i8 %a to float
+  %conv1 = fptosi float %conv to i32
+  ret i32 %conv1
+}
+
+; CHECK-LABEL: bar
+; CHECK-NOT: cvt
+; CHECK: movl
+define zeroext i8 @bar(i8 zeroext %a) #0 {
+  %conv = uitofp i8 %a to float
+  %conv1 = fptoui float %conv to i8
+  ret i8 %conv1
+}
+
+attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+