LegalizeTypes support for promotion of SIGN_EXTEND_INREG.

llvm-svn: 53603

1 files changed, 17 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/2008-07-15-SignExtendInreg.ll b/llvm/test/CodeGen/PowerPC/2008-07-15-SignExtendInreg.ll
new file mode 100644
index 00000000000..32e36427c5e
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/2008-07-15-SignExtendInreg.ll
@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | llc
+target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
+target triple = "powerpc-apple-darwin9"
+
+define i16 @t(i16* %dct) signext nounwind  {
+entry:
+         load i16* null, align 2         ; <i16>:0 [#uses=2]
+         lshr i16 %0, 11         ; <i16>:1 [#uses=0]
+         trunc i16 %0 to i8              ; <i8>:2 [#uses=1]
+         sext i8 %2 to i16               ; <i16>:3 [#uses=1]
+         add i16 0, %3           ; <i16>:4 [#uses=1]
+         sext i16 %4 to i32              ; <i32>:5 [#uses=1]
+         %dcval.0.in = shl i32 %5, 0             ; <i32> [#uses=1]
+         %dcval.0 = trunc i32 %dcval.0.in to i16         ; <i16>  [#uses=1]
+         store i16 %dcval.0, i16* %dct, align 2
+         ret i16 0
+}