1 files changed, 64 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2013-05-07-ByteLoadSameAddress.ll b/test/CodeGen/ARM/2013-05-07-ByteLoadSameAddress.ll
new file mode 100644
index 0000000..defb946
--- /dev/null
+++ b/test/CodeGen/ARM/2013-05-07-ByteLoadSameAddress.ll
@@ -0,0 +1,64 @@
+; RUN: llc < %s -march=thumb -mattr=+v7,+thumb2 | FileCheck %s
+
+define i8 @f1(i8* %call1, i8* %call3, i32 %h, i32 %w, i32 %Width) {
+; CHECK: f1:
+entry:
+        %mul17 = mul nsw i32 %Width, %h
+        %add = add nsw i32 %mul17, %w
+        %sub19 = sub i32 %add, %Width
+        %sub20 = add i32 %sub19, -1
+        %arrayidx21 = getelementptr inbounds i8* %call1, i32 %sub20
+        %0 = load i8* %arrayidx21, align 1
+        %conv22 = zext i8 %0 to i32
+        %arrayidx25 = getelementptr inbounds i8* %call1, i32 %sub19
+        %1 = load i8* %arrayidx25, align 1
+        %conv26 = zext i8 %1 to i32
+        %mul23189 = add i32 %conv26, %conv22
+        %add30 = add i32 %sub19, 1
+        %arrayidx31 = getelementptr inbounds i8* %call1, i32 %add30
+        %2 = load i8* %arrayidx31, align 1
+        %conv32 = zext i8 %2 to i32
+; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
+; CHECK-NEXT: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #1]
+        %add28190 = add i32 %mul23189, %conv32
+        %sub35 = add i32 %add, -1
+        %arrayidx36 = getelementptr inbounds i8* %call1, i32 %sub35
+        %3 = load i8* %arrayidx36, align 1
+        %conv37 = zext i8 %3 to i32
+        %add34191 = add i32 %add28190, %conv37
+        %arrayidx40 = getelementptr inbounds i8* %call1, i32 %add
+        %4 = load i8* %arrayidx40, align 1
+        %conv41 = zext i8 %4 to i32
+        %mul42 = mul nsw i32 %conv41, 255
+        %add44 = add i32 %add, 1
+        %arrayidx45 = getelementptr inbounds i8* %call1, i32 %add44
+        %5 = load i8* %arrayidx45, align 1
+        %conv46 = zext i8 %5 to i32
+; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
+; CHECK-NEXT: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #1]
+        %add49 = add i32 %add, %Width
+        %sub50 = add i32 %add49, -1
+        %arrayidx51 = getelementptr inbounds i8* %call1, i32 %sub50
+        %6 = load i8* %arrayidx51, align 1
+        %conv52 = zext i8 %6 to i32
+        %arrayidx56 = getelementptr inbounds i8* %call1, i32 %add49
+        %7 = load i8* %arrayidx56, align 1
+        %conv57 = zext i8 %7 to i32
+        %add61 = add i32 %add49, 1
+        %arrayidx62 = getelementptr inbounds i8* %call1, i32 %add61
+        %8 = load i8* %arrayidx62, align 1
+        %conv63 = zext i8 %8 to i32
+; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
+; CHECK-NEXT: ldrb{{[.w]*}} r{{[0-9]*}}, [r{{[0-9]*}}, #1]
+        %tmp = add i32 %add34191, %conv46
+        %tmp193 = add i32 %tmp, %conv52
+        %tmp194 = add i32 %tmp193, %conv57
+        %tmp195 = add i32 %tmp194, %conv63
+        %tmp196 = mul i32 %tmp195, -28
+        %add65 = add i32 %tmp196, %mul42
+        %9 = lshr i32 %add65, 8
+        %conv68 = trunc i32 %9 to i8
+        %arrayidx69 = getelementptr inbounds i8* %call3, i32 %add
+        store i8 %conv68, i8* %arrayidx69, align 1
+        ret i8 %conv68
+}