32 bit shifts have only 12 bit displacements

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76000 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/2009-07-04-Shl32.ll b/test/CodeGen/SystemZ/2009-07-04-Shl32.ll
new file mode 100644
index 0000000000..8547ec3314
--- /dev/null
+++ b/test/CodeGen/SystemZ/2009-07-04-Shl32.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | llc
+
+target datalayout = "E-p:64:64:64-i8:8:16-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-a0:16:16"
+target triple = "s390x-linux"
+
+define void @compdecomp(i8* nocapture %data, i64 %data_len) nounwind {
+entry:
+	br label %for.body38
+
+for.body38:		; preds = %for.body38, %entry
+	br i1 undef, label %for.cond220, label %for.body38
+
+for.cond220:		; preds = %for.cond220, %for.body38
+	br i1 false, label %for.cond220, label %for.end297
+
+for.end297:		; preds = %for.cond220
+	%tmp334 = load i8* undef		; <i8> [#uses=1]
+	%conv343 = zext i8 %tmp334 to i32		; <i32> [#uses=1]
+	%sub344 = add i32 %conv343, -1		; <i32> [#uses=1]
+	%shl345 = shl i32 1, %sub344		; <i32> [#uses=1]
+	%conv346 = sext i32 %shl345 to i64		; <i64> [#uses=1]
+	br label %for.body356
+
+for.body356:		; preds = %for.body356, %for.end297
+	%mask.1633 = phi i64 [ %conv346, %for.end297 ], [ undef, %for.body356 ]		; <i64> [#uses=0]
+	br label %for.body356
+}