diff options
| -rw-r--r-- | llvm/lib/Analysis/GlobalsModRef.cpp | 15 | ||||
| -rw-r--r-- | llvm/test/Analysis/GlobalsModRef/nocapture.ll | 57 |
2 files changed, 0 insertions, 72 deletions
diff --git a/llvm/lib/Analysis/GlobalsModRef.cpp b/llvm/lib/Analysis/GlobalsModRef.cpp index 249f3954d55..1babb822074 100644 --- a/llvm/lib/Analysis/GlobalsModRef.cpp +++ b/llvm/lib/Analysis/GlobalsModRef.cpp @@ -358,21 +358,6 @@ bool GlobalsAAResult::AnalyzeUsesOfPointer(Value *V, if (CS.isArgOperand(&U) && isFreeCall(I, &TLI)) { if (Writers) Writers->insert(CS->getParent()->getParent()); - } else if (CS.doesNotCapture(CS.getDataOperandNo(&U))) { - Function *ParentF = CS->getParent()->getParent(); - // A nocapture argument may be read from or written to, but does not - // escape unless the call can somehow recurse. - // - // nocapture "indicates that the callee does not make any copies of - // the pointer that outlive itself". Therefore if we directly or - // indirectly recurse, we must treat the pointer as escaping. - if (FunctionToSCCMap[ParentF] == - FunctionToSCCMap[CS.getCalledFunction()]) - return true; - if (Readers) - Readers->insert(ParentF); - if (Writers) - Writers->insert(ParentF); } else { return true; // Argument of an unknown call. } diff --git a/llvm/test/Analysis/GlobalsModRef/nocapture.ll b/llvm/test/Analysis/GlobalsModRef/nocapture.ll deleted file mode 100644 index 0cb80a10f8d..00000000000 --- a/llvm/test/Analysis/GlobalsModRef/nocapture.ll +++ /dev/null @@ -1,57 +0,0 @@ -; RUN: opt < %s -globals-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s - -target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" -target triple = "x86_64-apple-macosx10.10.0" - -@a = internal global i32 0, align 4 -@b = internal global i32 0, align 4 - -define void @g(i32* %p, void (i32*)* nocapture %ptr) { -entry: - tail call void %ptr(i32* %p) #1 - ret void -} - -; CHECK-LABEL: Function: f -; CHECK: MayAlias: i32* %p, i32* @a -; CHECK: MayAlias: i32* %q, i32* @a -define i32 @f(i32 %n, i32* nocapture readonly %p, i32* nocapture %q, void (i32*)* nocapture %ptr) { -entry: - tail call void @g(i32* nonnull @a, void (i32*)* %ptr) - %arrayidx = getelementptr inbounds i32, i32* %p, i64 0 - %z1 = load i32, i32* %arrayidx, align 4 - %z2 = load i32, i32* %q, align 4 - %add = add nsw i32 %z2, %z1 - store i32 %add, i32* %q, align 4 - ret i32 4 -} - -define void @g2(i32* nocapture %p, void (i32*)* nocapture %ptr) { -entry: - tail call void %ptr(i32* %p) #1 - ret void -} - -; CHECK-LABEL: Function: f2 -; CHECK: NoAlias: i32* %p, i32* @b -; CHECK: NoAlias: i32* %q, i32* @b -define i32 @f2(i32 %n, i32* nocapture readonly %p, i32* nocapture %q, void (i32*)* nocapture %ptr) { -entry: - tail call void @g2(i32* nonnull @b, void (i32*)* %ptr) - %arrayidx = getelementptr inbounds i32, i32* %p, i64 0 - %z1 = load i32, i32* %arrayidx, align 4 - %z2 = load i32, i32* %q, align 4 - %add = add nsw i32 %z2, %z1 - store i32 %add, i32* %q, align 4 - ret i32 4 -} - -declare void @g3() - -; CHECK-LABEL: Function: f3 -; CHECK: NoAlias: i32* %p, i32* @b -define void @f3(i32* nocapture readonly %p) { -entry: - tail call void @g3() [ "deopt"(i32* @b, i32 *%p) ] - unreachable -} |
