5 files changed, 108 insertions, 3 deletions
diff --git a/test/Analysis/BasicAA/2010-09-15-GEP-SignedArithmetic.ll b/test/Analysis/BasicAA/2010-09-15-GEP-SignedArithmetic.ll
index 2b0cd78..7b5584e 100644
--- a/test/Analysis/BasicAA/2010-09-15-GEP-SignedArithmetic.ll
+++ b/test/Analysis/BasicAA/2010-09-15-GEP-SignedArithmetic.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output |& grep {1 may alias}
+; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output |& grep {1 partial alias}
 ; PR7959
 
 target datalayout = "e-p:32:32:32"
diff --git a/test/Analysis/BasicAA/dag.ll b/test/Analysis/BasicAA/dag.ll
new file mode 100644
index 0000000..501f4c3
--- /dev/null
+++ b/test/Analysis/BasicAA/dag.ll
@@ -0,0 +1,41 @@
+; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info |& FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+
+; BasicAA's guard against use-def cycles shouldn't prevent it from
+; analyzing use-def dags.
+
+; CHECK: MustAlias:  i8* %base, i8* %phi
+; CHECK: MustAlias: i8* %phi, i8* %wwa
+; CHECK: MustAlias: i8* %phi, i8* %wwb
+; CHECK: MustAlias: i16* %bigbase, i8* %phi
+define i8 @foo(i8* %base, i1 %x, i1 %w) {
+entry:
+  br i1 %w, label %wa, label %wb
+wa:
+  %wwa = bitcast i8* %base to i8*
+  br label %wc
+wb:
+  %wwb = bitcast i8* %base to i8*
+  br label %wc
+wc:
+  %first = phi i8* [ %wwa, %wa ], [ %wwb, %wb ]
+  %fc = bitcast i8* %first to i8*
+  br i1 %x, label %xa, label %xb
+xa:
+  %xxa = bitcast i8* %fc to i8*
+  br label %xc
+xb:
+  %xxb = bitcast i8* %fc to i8*
+  br label %xc
+xc:
+  %phi = phi i8* [ %xxa, %xa ], [ %xxb, %xb ]
+
+  store i8 0, i8* %phi
+
+  %bigbase = bitcast i8* %base to i16*
+  store i16 -1, i16* %bigbase
+
+  %loaded = load i8* %phi
+  ret i8 %loaded
+}
diff --git a/test/Analysis/BasicAA/modref.ll b/test/Analysis/BasicAA/modref.ll
index ec0c8a7..7a71e3e 100644
--- a/test/Analysis/BasicAA/modref.ll
+++ b/test/Analysis/BasicAA/modref.ll
@@ -102,7 +102,7 @@ define i32 @test4(i8* %P) {
   %sub = sub i32 %tmp2, %tmp
   ret i32 %sub
 ; CHECK: @test4
-; CHECK: load i32* @G
+; CHECK-NOT: load
 ; CHECK: memset.p0i8.i32
 ; CHECK-NOT: load
 ; CHECK: ret i32 0
@@ -117,7 +117,7 @@ define i32 @test5(i8* %P, i32 %Len) {
   %sub = sub i32 %tmp2, %tmp
   ret i32 %sub
 ; CHECK: @test5
-; CHECK: load i32* @G
+; CHECK-NOT: load
 ; CHECK: memcpy.p0i8.p0i8.i32
 ; CHECK-NOT: load
 ; CHECK: ret i32 0
diff --git a/test/Analysis/BasicAA/must-and-partial.ll b/test/Analysis/BasicAA/must-and-partial.ll
new file mode 100644
index 0000000..93b6184
--- /dev/null
+++ b/test/Analysis/BasicAA/must-and-partial.ll
@@ -0,0 +1,39 @@
+; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info |& FileCheck %s
+
+; When merging MustAlias and PartialAlias, merge to PartialAlias
+; instead of MayAlias.
+
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+
+; CHECK: PartialAlias:  i16* %bigbase0, i8* %phi
+define i8 @test0(i8* %base, i1 %x) {
+entry:
+  %baseplusone = getelementptr i8* %base, i64 1
+  br i1 %x, label %red, label %green
+red:
+  br label %green
+green:
+  %phi = phi i8* [ %baseplusone, %red ], [ %base, %entry ]
+  store i8 0, i8* %phi
+
+  %bigbase0 = bitcast i8* %base to i16*
+  store i16 -1, i16* %bigbase0
+
+  %loaded = load i8* %phi
+  ret i8 %loaded
+}
+
+; CHECK: PartialAlias:  i16* %bigbase1, i8* %sel
+define i8 @test1(i8* %base, i1 %x) {
+entry:
+  %baseplusone = getelementptr i8* %base, i64 1
+  %sel = select i1 %x, i8* %baseplusone, i8* %base
+  store i8 0, i8* %sel
+
+  %bigbase1 = bitcast i8* %base to i16*
+  store i16 -1, i16* %bigbase1
+
+  %loaded = load i8* %sel
+  ret i8 %loaded
+}
diff --git a/test/Analysis/BasicAA/underlying-value.ll b/test/Analysis/BasicAA/underlying-value.ll
new file mode 100644
index 0000000..0671c82
--- /dev/null
+++ b/test/Analysis/BasicAA/underlying-value.ll
@@ -0,0 +1,25 @@
+; RUN: opt -basicaa -licm -S < %s
+; PR9931
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+
+define void @func_20() nounwind {
+entry:
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.cond2, %entry
+  br i1 undef, label %for.cond2, label %for.end22
+
+for.cond2:                                        ; preds = %for.body5, %for.cond
+  br i1 false, label %for.body5, label %for.cond
+
+for.body5:                                        ; preds = %for.cond2
+  %arrayidx = getelementptr inbounds [2 x i64]* undef, i32 0, i64 0
+  %tmp7 = load i64* %arrayidx, align 8
+  %arrayidx9 = getelementptr inbounds [2 x i64]* undef, i32 0, i64 undef
+  %tmp10 = load i64* %arrayidx9, align 8
+  br label %for.cond2
+
+for.end22:                                        ; preds = %for.cond
+  ret void
+}