LowerFP_TO_SINT must not create a stack object if it's not needed.

llvm-svn: 43004

1 files changed, 18 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/fp2sint.ll b/llvm/test/CodeGen/X86/fp2sint.ll
new file mode 100644
index 00000000000..80f7efbe4de
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fp2sint.ll
@@ -0,0 +1,18 @@
+;; LowerFP_TO_SINT should not create a stack object if it's not needed.
+
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | not grep add
+
+define i32 @main(i32 %argc, i8** %argv) {
+cond_false.i.i.i:               ; preds = %bb.i5
+       %tmp35.i = load double* null, align 8           ; <double> [#uses=1]
+       %tmp3536.i = fptosi double %tmp35.i to i32              ; <i32> [#uses=1]
+       %tmp3536140.i = zext i32 %tmp3536.i to i64              ; <i64> [#uses=1]
+       %tmp39.i = load double* null, align 4           ; <double> [#uses=1]
+       %tmp3940.i = fptosi double %tmp39.i to i32              ; <i32> [#uses=1]
+       %tmp3940137.i = zext i32 %tmp3940.i to i64              ; <i64> [#uses=1]
+       %tmp3940137138.i = shl i64 %tmp3940137.i, 32            ; <i64> [#uses=1]
+       %tmp3940137138.ins.i = or i64 %tmp3940137138.i, %tmp3536140.i           ; <i64> [#uses=1]
+       %tmp95.i.i = trunc i64 %tmp3940137138.ins.i to i32              ; <i32> [#uses=1]
+       store i32 %tmp95.i.i, i32* null, align 4
+       ret i32 0
+}