From c77764591b06655bca4313ccfb5b1b773849387e Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 7 Apr 2012 17:19:26 +0000
Subject: [PATCH] SCEV: When expanding a GEP the final addition to the base
 pointer has NUW but not NSW.

Found by inspection.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154262 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/ScalarEvolution.cpp            | 2 +-
 test/Analysis/ScalarEvolution/nsw-offset.ll | 6 +++---
 test/Analysis/ScalarEvolution/nsw.ll        | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 205227ca0b7..1d55642079a 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -3187,7 +3187,7 @@ const SCEV *ScalarEvolution::createNodeForGEP(GEPOperator *GEP) {
 
   // Add the total offset from all the GEP indices to the base.
   return getAddExpr(BaseS, TotalOffset,
-                    isInBounds ? SCEV::FlagNSW : SCEV::FlagAnyWrap);
+                    isInBounds ? SCEV::FlagNUW : SCEV::FlagAnyWrap);
 }
 
 /// GetMinTrailingZeros - Determine the minimum number of zero bits that S is
diff --git a/test/Analysis/ScalarEvolution/nsw-offset.ll b/test/Analysis/ScalarEvolution/nsw-offset.ll
index 8969a5ad4ce..a919319bdcd 100644
--- a/test/Analysis/ScalarEvolution/nsw-offset.ll
+++ b/test/Analysis/ScalarEvolution/nsw-offset.ll
@@ -23,7 +23,7 @@ bb:                                               ; preds = %bb.nph, %bb1
   %1 = sext i32 %i.01 to i64                      ; <i64> [#uses=1]
 
 ; CHECK: %2 = getelementptr inbounds double* %d, i64 %1
-; CHECK: -->  {%d,+,16}<nsw><%bb>
+; CHECK: -->  {%d,+,16}<nuw><%bb>
   %2 = getelementptr inbounds double* %d, i64 %1  ; <double*> [#uses=1]
 
   %3 = load double* %2, align 8                   ; <double> [#uses=1]
@@ -37,7 +37,7 @@ bb:                                               ; preds = %bb.nph, %bb1
   %8 = sext i32 %7 to i64                         ; <i64> [#uses=1]
 
 ; CHECK: %9 = getelementptr inbounds double* %q, i64 %8
-; CHECK: {(8 + %q),+,16}<nsw><%bb>
+; CHECK: {(8 + %q),+,16}<nuw><%bb>
   %9 = getelementptr inbounds double* %q, i64 %8  ; <double*> [#uses=1]
 
 ; Artificially repeat the above three instructions, this time using
@@ -49,7 +49,7 @@ bb:                                               ; preds = %bb.nph, %bb1
   %t8 = sext i32 %t7 to i64                         ; <i64> [#uses=1]
 
 ; CHECK: %t9 = getelementptr inbounds double* %q, i64 %t8
-; CHECK: {(8 + %q),+,16}<nsw><%bb>
+; CHECK: {(8 + %q),+,16}<nuw><%bb>
   %t9 = getelementptr inbounds double* %q, i64 %t8  ; <double*> [#uses=1]
 
   %10 = load double* %9, align 8                  ; <double> [#uses=1]
diff --git a/test/Analysis/ScalarEvolution/nsw.ll b/test/Analysis/ScalarEvolution/nsw.ll
index 659cf4f8da9..288b6facd94 100644
--- a/test/Analysis/ScalarEvolution/nsw.ll
+++ b/test/Analysis/ScalarEvolution/nsw.ll
@@ -92,10 +92,10 @@ for.body.i.i:                                     ; preds = %entry, %for.body.i.
 ; CHECK: {1,+,1}<nuw><nsw><%for.body.i.i>
   %ptrincdec.i.i = getelementptr inbounds i32* %begin, i64 %tmp
 ; CHECK: %ptrincdec.i.i =
-; CHECK: {(4 + %begin),+,4}<nsw><%for.body.i.i>
+; CHECK: {(4 + %begin),+,4}<nuw><%for.body.i.i>
   %__first.addr.08.i.i = getelementptr inbounds i32* %begin, i64 %indvar.i.i
 ; CHECK: %__first.addr.08.i.i
-; CHECK: {%begin,+,4}<nsw><%for.body.i.i>
+; CHECK: {%begin,+,4}<nuw><%for.body.i.i>
   store i32 0, i32* %__first.addr.08.i.i, align 4
   %cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
   br i1 %cmp.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.i.i