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-rw-r--r--llvm/lib/Analysis/InstructionSimplify.cpp16
-rw-r--r--llvm/test/Transforms/InstSimplify/noalias-ptr.ll153
2 files changed, 4 insertions, 165 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index 51a295aa5b4..85ebf694e69 100644
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -2026,22 +2026,12 @@ static Constant *computePointerICmp(const DataLayout *DL,
};
// Is the set of underlying objects all things which must be disjoint from
- // noalias calls. For allocas, we consider only static ones (dynamic
- // allocas might be transformed into calls to malloc not simultaneously
- // live with the compared-to allocation). For globals, we exclude symbols
- // that might be resolve lazily to symbols in another dynamically-loaded
- // library (and, thus, could be malloc'ed by the implementation).
+ // noalias calls.
auto IsAllocDisjoint = [](SmallVectorImpl<Value *> &Objects) {
return std::all_of(Objects.begin(), Objects.end(),
[](Value *V){
- if (const AllocaInst *AI = dyn_cast<AllocaInst>(V))
- return AI->isStaticAlloca();
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
- return (GV->hasLocalLinkage() ||
- GV->hasHiddenVisibility() ||
- GV->hasProtectedVisibility() ||
- GV->hasUnnamedAddr()) &&
- !GV->isThreadLocal();
+ if (isa<AllocaInst>(V) || isa<GlobalValue>(V))
+ return true;
if (const Argument *A = dyn_cast<Argument>(V))
return A->hasByValAttr();
return false;
diff --git a/llvm/test/Transforms/InstSimplify/noalias-ptr.ll b/llvm/test/Transforms/InstSimplify/noalias-ptr.ll
index 7693e554235..e3435097880 100644
--- a/llvm/test/Transforms/InstSimplify/noalias-ptr.ll
+++ b/llvm/test/Transforms/InstSimplify/noalias-ptr.ll
@@ -3,11 +3,6 @@ target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@g1 = global i32 0, align 4
-@g2 = internal global i32 0, align 4
-@g3 = unnamed_addr global i32 0, align 4
-@g4 = hidden global i32 0, align 4
-@g5 = protected global i32 0, align 4
-@g6 = thread_local unnamed_addr global i32 0, align 4
; Make sure we can simplify away a pointer comparison between
; dynamically-allocated memory and a local stack allocation.
@@ -48,7 +43,7 @@ define void @_Z2p2bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
%mStackData = alloca [10 x i32], align 16
%1 = bitcast [10 x i32]* %mStackData to i8*
%2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g2
+ %3 = select i1 %b1, i32* %2, i32* @g1
%4 = tail call noalias i8* @_Znam(i64 48) #4
%5 = tail call noalias i8* @_Znam(i64 48) #4
%.v = select i1 %b2, i8* %4, i8* %5
@@ -69,81 +64,6 @@ define void @_Z2p2bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
ret void
}
-define void @_Z2p4bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
- %mStackData = alloca [10 x i32], align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g3
- %4 = tail call noalias i8* @_Znam(i64 48) #4
- %5 = tail call noalias i8* @_Znam(i64 48) #4
- %.v = select i1 %b2, i8* %4, i8* %5
- %6 = bitcast i8* %.v to i32*
- %7 = icmp eq i32* %6, %3
- br i1 %7, label %9, label %8
-
-; CHECK-LABEL: @_Z2p4bb
-; CHECK-NOT: icmp
-; CHECK: ret void
-
-; <label>:8 ; preds = %0
- call void @_ZdaPv(i8* %4) #5
- call void @_ZdaPv(i8* %5) #5
- br label %9
-
-; <label>:9 ; preds = %0, %8
- ret void
-}
-
-define void @_Z2p5bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
- %mStackData = alloca [10 x i32], align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g4
- %4 = tail call noalias i8* @_Znam(i64 48) #4
- %5 = tail call noalias i8* @_Znam(i64 48) #4
- %.v = select i1 %b2, i8* %4, i8* %5
- %6 = bitcast i8* %.v to i32*
- %7 = icmp eq i32* %6, %3
- br i1 %7, label %9, label %8
-
-; CHECK-LABEL: @_Z2p5bb
-; CHECK-NOT: icmp
-; CHECK: ret void
-
-; <label>:8 ; preds = %0
- call void @_ZdaPv(i8* %4) #5
- call void @_ZdaPv(i8* %5) #5
- br label %9
-
-; <label>:9 ; preds = %0, %8
- ret void
-}
-
-define void @_Z2p6bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
- %mStackData = alloca [10 x i32], align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g5
- %4 = tail call noalias i8* @_Znam(i64 48) #4
- %5 = tail call noalias i8* @_Znam(i64 48) #4
- %.v = select i1 %b2, i8* %4, i8* %5
- %6 = bitcast i8* %.v to i32*
- %7 = icmp eq i32* %6, %3
- br i1 %7, label %9, label %8
-
-; CHECK-LABEL: @_Z2p6bb
-; CHECK-NOT: icmp
-; CHECK: ret void
-
-; <label>:8 ; preds = %0
- call void @_ZdaPv(i8* %4) #5
- call void @_ZdaPv(i8* %5) #5
- br label %9
-
-; <label>:9 ; preds = %0, %8
- ret void
-}
-
; Here's another case involving multiple underlying objects, but this time we
; must keep the comparison (it might involve a regular pointer-typed function
; argument).
@@ -173,77 +93,6 @@ define void @_Z4nopebbPi(i1 zeroext %b1, i1 zeroext %b2, i32* readnone %q) #0 {
ret void
}
-define void @_Z2p3bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
- %mStackData = alloca [10 x i32], align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g1
- %4 = tail call noalias i8* @_Znam(i64 48) #4
- %5 = tail call noalias i8* @_Znam(i64 48) #4
- %.v = select i1 %b2, i8* %4, i8* %5
- %6 = bitcast i8* %.v to i32*
- %7 = icmp eq i32* %6, %3
- br i1 %7, label %9, label %8
-
-; CHECK-LABEL: @_Z2p3bb
-; CHECK: icmp
-; CHECK: ret void
-
-; <label>:8 ; preds = %0
- call void @_ZdaPv(i8* %4) #5
- call void @_ZdaPv(i8* %5) #5
- br label %9
-
-; <label>:9 ; preds = %0, %8
- ret void
-}
-
-define void @_Z2p7bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
- %mStackData = alloca [10 x i32], align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %3 = select i1 %b1, i32* %2, i32* @g6
- %4 = tail call noalias i8* @_Znam(i64 48) #4
- %5 = tail call noalias i8* @_Znam(i64 48) #4
- %.v = select i1 %b2, i8* %4, i8* %5
- %6 = bitcast i8* %.v to i32*
- %7 = icmp eq i32* %6, %3
- br i1 %7, label %9, label %8
-
-; CHECK-LABEL: @_Z2p7bb
-; CHECK: icmp
-; CHECK: ret void
-
-; <label>:8 ; preds = %0
- call void @_ZdaPv(i8* %4) #5
- call void @_ZdaPv(i8* %5) #5
- br label %9
-
-; <label>:9 ; preds = %0, %8
- ret void
-}
-
-define void @_Z2p2v(i32 %c) #0 {
- %mStackData = alloca [10 x i32], i32 %c, align 16
- %1 = bitcast [10 x i32]* %mStackData to i8*
- %2 = tail call noalias i8* @_Znam(i64 48) #4
- %3 = bitcast i8* %2 to i32*
- %4 = getelementptr inbounds [10 x i32]* %mStackData, i64 0, i64 0
- %5 = icmp eq i32* %3, %4
- br i1 %5, label %7, label %6
-
-; CHECK-LABEL: @_Z2p2v
-; CHECK: icmp
-; CHECK: ret void
-
-; <label>:6 ; preds = %0
- call void @_ZdaPv(i8* %2) #5
- br label %7
-
-; <label>:7 ; preds = %0, %6
- ret void
-}
-
; Function Attrs: nobuiltin
declare noalias i8* @_Znam(i64) #2
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