ARM: Negative offset support problem
This patch is to permit a negative offset usage for a non frame access.
Patch by Igor Oblakov.
llvm-svn: 217431
diff --git a/llvm/test/CodeGen/ARM/negative-offset.ll b/llvm/test/CodeGen/ARM/negative-offset.ll
new file mode 100644
index 0000000..7b949fd
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/negative-offset.ll
@@ -0,0 +1,17 @@
+; RUN: llc -mtriple=arm-eabi -O3 %s -o - | FileCheck %s
+
+; Function Attrs: nounwind readonly
+define arm_aapcscc i32 @sum(i32* nocapture readonly %p) #0 {
+entry:
+;CHECK-LABEL: sum:
+;CHECK-NOT: sub
+;CHECK: ldr r{{.*}}, [r0, #-16]
+;CHECK: ldr r{{.*}}, [r0, #-8]
+ %arrayidx = getelementptr inbounds i32* %p, i32 -4
+ %0 = load i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %p, i32 -2
+ %1 = load i32* %arrayidx1, align 4
+ %add = add nsw i32 %1, %0
+ ret i32 %add
+}
+