diff options
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 2 | ||||
| -rw-r--r-- | test/Transforms/LICM/hoist-invariant-load.ll | 39 |
2 files changed, 41 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index b79bb1300f..8098b3608e 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -369,6 +369,8 @@ bool LICM::canSinkOrHoistInst(Instruction &I) { // in the same alias set as something that ends up being modified. if (AA->pointsToConstantMemory(LI->getOperand(0))) return true; + if (LI->getMetadata(LI->getContext().getMDKindID("invariant.load"))) + return true; // Don't hoist loads which have may-aliased stores in loop. uint64_t Size = 0; diff --git a/test/Transforms/LICM/hoist-invariant-load.ll b/test/Transforms/LICM/hoist-invariant-load.ll new file mode 100644 index 0000000000..4e100d3aee --- /dev/null +++ b/test/Transforms/LICM/hoist-invariant-load.ll @@ -0,0 +1,39 @@ +; RUN: opt < %s -licm -stats -S |& grep "1 licm" + +@"\01L_OBJC_METH_VAR_NAME_" = internal global [4 x i8] c"foo\00", section "__TEXT,__objc_methname,cstring_literals", align 1 +@"\01L_OBJC_SELECTOR_REFERENCES_" = internal global i8* getelementptr inbounds ([4 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" +@"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip" +@llvm.used = appending global [3 x i8*] [i8* getelementptr inbounds ([4 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), i8* bitcast (i8** @"\01L_OBJC_SELECTOR_REFERENCES_" to i8*), i8* bitcast ([2 x i32]* @"\01L_OBJC_IMAGE_INFO" to i8*)], section "llvm.metadata" + +define void @test(i8* %x) uwtable ssp { +entry: + %x.addr = alloca i8*, align 8 + %i = alloca i32, align 4 + store i8* %x, i8** %x.addr, align 8 + store i32 0, i32* %i, align 4 + br label %for.cond + +for.cond: ; preds = %for.inc, %entry + %0 = load i32* %i, align 4 + %cmp = icmp ult i32 %0, 10000 + br i1 %cmp, label %for.body, label %for.end + +for.body: ; preds = %for.cond + %1 = load i8** %x.addr, align 8 + %2 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", !invariant.load !0 + %call = call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* (i8*, i8*)*)(i8* %1, i8* %2) + br label %for.inc + +for.inc: ; preds = %for.body + %3 = load i32* %i, align 4 + %inc = add i32 %3, 1 + store i32 %inc, i32* %i, align 4 + br label %for.cond + +for.end: ; preds = %for.cond + ret void +} + +declare i8* @objc_msgSend(i8*, i8*, ...) nonlazybind + +!0 = metadata !{} |