fix PR3995. A scale must be 1, 2, 4 or 8.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69284 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 23 insertions, 0 deletions

diff --git a/test/CodeGen/X86/2009-04-scale.ll b/test/CodeGen/X86/2009-04-scale.ll
new file mode 100644
index 0000000000..0766dc79e0
--- /dev/null
+++ b/test/CodeGen/X86/2009-04-scale.ll
@@ -0,0 +1,23 @@
+; RUN: llvm-as < %s | llc -march=x86 -mtriple=i386-unknown-linux-gnu
+; PR3995
+
+        %struct.vtable = type { i32 (...)** }
+	%struct.array = type { %struct.impl, [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair], [256 x %struct.pair] }
+	%struct.impl = type { %struct.vtable, i8, %struct.impl*, i32, i32, i64, i64 }
+	%struct.pair = type { i64, i64 }
+
+define void @test() {
+entry:
+	%0 = load i32* null, align 4		; <i32> [#uses=1]
+	%1 = lshr i32 %0, 8		; <i32> [#uses=1]
+	%2 = and i32 %1, 255		; <i32> [#uses=1]
+	%3 = getelementptr %struct.array* null, i32 0, i32 3		; <[256 x %struct.pair]*> [#uses=1]
+	%4 = getelementptr [256 x %struct.pair]* %3, i32 0, i32 %2		; <%struct.pair*> [#uses=1]
+	%5 = getelementptr %struct.pair* %4, i32 0, i32 1		; <i64*> [#uses=1]
+	%6 = load i64* %5, align 4		; <i64> [#uses=1]
+	%7 = xor i64 0, %6		; <i64> [#uses=1]
+	%8 = xor i64 %7, 0		; <i64> [#uses=1]
+	%9 = xor i64 %8, 0		; <i64> [#uses=1]
+	store i64 %9, i64* null, align 8
+	unreachable
+}