llvm/0001-Backport-rL281650.patch

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From 7801978ec1f3637fcda1b564048ebc732bf586af Mon Sep 17 00:00:00 2001
From: Simonas Kazlauskas <git@kazlauskas.me>
Date: Fri, 16 Sep 2016 00:32:20 +0300
Subject: [PATCH] Backport rL281650
---
lib/Transforms/InstCombine/InstCombineCompares.cpp | 2 +-
test/Transforms/InstCombine/indexed-gep-compares.ll | 20 ++++++++++++++++++++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp
index bfd73f4bbac5..961497fe3c2d 100644
--- a/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -634,7 +634,7 @@ static bool canRewriteGEPAsOffset(Value *Start, Value *Base,
}
if (!isa<IntToPtrInst>(V) && !isa<PtrToIntInst>(V) &&
- !isa<GEPOperator>(V) && !isa<PHINode>(V))
+ !isa<GetElementPtrInst>(V) && !isa<PHINode>(V))
// We've found some value that we can't explore which is different from
// the base. Therefore we can't do this transformation.
return false;
diff --git a/test/Transforms/InstCombine/indexed-gep-compares.ll b/test/Transforms/InstCombine/indexed-gep-compares.ll
index 495881549e25..64dff2712976 100644
--- a/test/Transforms/InstCombine/indexed-gep-compares.ll
+++ b/test/Transforms/InstCombine/indexed-gep-compares.ll
@@ -167,4 +167,24 @@ lpad:
; CHECK: ret i32* %[[PTR]]
}
+
+@pr30402 = constant i64 3
+define i1 @test7() {
+entry:
+ br label %bb7
+
+bb7: ; preds = %bb10, %entry-block
+ %phi = phi i64* [ @pr30402, %entry ], [ getelementptr inbounds (i64, i64* @pr30402, i32 1), %bb7 ]
+ %cmp = icmp eq i64* %phi, getelementptr inbounds (i64, i64* @pr30402, i32 1)
+ br i1 %cmp, label %bb10, label %bb7
+
+bb10:
+ ret i1 %cmp
+}
+; CHECK-LABEL: @test7(
+; CHECK: %[[phi:.*]] = phi i64* [ @pr30402, %entry ], [ getelementptr inbounds (i64, i64* @pr30402, i32 1), %bb7 ]
+; CHECK: %[[cmp:.*]] = icmp eq i64* %[[phi]], getelementptr inbounds (i64, i64* @pr30402, i32 1)
+; CHECK: ret i1 %[[cmp]]
+
+
declare i32 @__gxx_personality_v0(...)
--
2.7.4