1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fast-isel-gep.ll b/test/CodeGen/X86/fast-isel-gep.ll
new file mode 100644
index 0000000..fb24f19
--- /dev/null
+++ b/test/CodeGen/X86/fast-isel-gep.ll
@@ -0,0 +1,33 @@
+; RUN: llc < %s -march=x86-64 -O0 | FileCheck %s --check-prefix=X64
+; RUN: llc < %s -march=x86 -O0 | FileCheck %s --check-prefix=X32
+; PR3181
+
+; GEP indices are interpreted as signed integers, so they
+; should be sign-extended to 64 bits on 64-bit targets.
+
+define i32 @test1(i32 %t3, i32* %t1) nounwind {
+       %t9 = getelementptr i32* %t1, i32 %t3           ; <i32*> [#uses=1]
+       %t15 = load i32* %t9            ; <i32> [#uses=1]
+       ret i32 %t15
+; X32: test1:
+; X32:  	movl	(%ecx,%eax,4), %eax
+; X32:  	ret
+
+; X64: test1:
+; X64:  	movslq	%edi, %rax
+; X64:  	movl	(%rsi,%rax,4), %eax
+; X64:  	ret
+
+}
+define i32 @test2(i64 %t3, i32* %t1) nounwind {
+       %t9 = getelementptr i32* %t1, i64 %t3           ; <i32*> [#uses=1]
+       %t15 = load i32* %t9            ; <i32> [#uses=1]
+       ret i32 %t15
+; X32: test2:
+; X32:  	movl	(%eax,%ecx,4), %eax
+; X32:  	ret
+
+; X64: test2:
+; X64:  	movl	(%rsi,%rdi,4), %eax
+; X64:  	ret
+}