1 files changed, 12 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll b/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll
new file mode 100644
index 000000000000..2c3313efa2a8
--- /dev/null
+++ b/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep zext
+
+; Never merge these two conversions, even though it's possible: this is
+; significantly more expensive than the two conversions on some targets
+; and it causes libgcc to be compile __fixunsdfdi into a recursive 
+; function.
+define i64 @test(double %D) {
+        %A = fptoui double %D to i32            ; <i32> [#uses=1]
+        %B = zext i32 %A to i64         ; <i64> [#uses=1]
+        ret i64 %B
+}
+