diff options
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 14 | ||||
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/optsize.ll | 39 |
2 files changed, 39 insertions, 14 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index ad57f0d40b3..d40fe33e6c0 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -1719,8 +1719,7 @@ struct LoopVectorize : public FunctionPass { // Check the function attributes to find out if this function should be // optimized for size. bool OptForSize = Hints.getForce() != LoopVectorizeHints::FK_Enabled && - // FIXME: Use Function::optForSize(). - F->hasFnAttribute(Attribute::OptimizeForSize); + F->optForSize(); // Compute the weighted frequency of this loop being executed and see if it // is less than 20% of the function entry baseline frequency. Note that we @@ -4614,8 +4613,9 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize) { emitAnalysis(VectorizationReport() << "runtime pointer checks needed. Enable vectorization of this " "loop with '#pragma clang loop vectorize(enable)' when " - "compiling with -Os"); - DEBUG(dbgs() << "LV: Aborting. Runtime ptr check is required in Os.\n"); + "compiling with -Os/-Oz"); + DEBUG(dbgs() << + "LV: Aborting. Runtime ptr check is required with -Os/-Oz.\n"); return Factor; } @@ -4659,7 +4659,7 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize) { emitAnalysis (VectorizationReport() << "unable to calculate the loop count due to complex control flow"); - DEBUG(dbgs() << "LV: Aborting. A tail loop is required in Os.\n"); + DEBUG(dbgs() << "LV: Aborting. A tail loop is required with -Os/-Oz.\n"); return Factor; } @@ -4675,8 +4675,8 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize) { "cannot optimize for size and vectorize at the " "same time. Enable vectorization of this loop " "with '#pragma clang loop vectorize(enable)' " - "when compiling with -Os"); - DEBUG(dbgs() << "LV: Aborting. A tail loop is required in Os.\n"); + "when compiling with -Os/-Oz"); + DEBUG(dbgs() << "LV: Aborting. A tail loop is required with -Os/-Oz.\n"); return Factor; } } diff --git a/llvm/test/Transforms/LoopVectorize/optsize.ll b/llvm/test/Transforms/LoopVectorize/optsize.ll index aa0ee0eadb2..513657cd372 100644 --- a/llvm/test/Transforms/LoopVectorize/optsize.ll +++ b/llvm/test/Transforms/LoopVectorize/optsize.ll @@ -1,17 +1,17 @@ ; This test verifies that the loop vectorizer will NOT produce a tail -; loop with Optimize for size attibute. +; loop with the optimize for size or the minimize size attributes. ; REQUIRES: asserts -; RUN: opt < %s -loop-vectorize -debug -debug-only=loop-vectorize -S 2>&1 | FileCheck %s - -; CHECK-NOT: <2 x i8> -; CHECK-NOT: <4 x i8> -; CHECK: Aborting. A tail loop is required in Os. +; RUN: opt < %s -loop-vectorize -S | FileCheck %s target datalayout = "E-m:e-p:32:32-i64:32-f64:32:64-a:0:32-n32-S128" @tab = common global [32 x i8] zeroinitializer, align 1 -define i32 @foo() #0 { +define i32 @foo_optsize() #0 { +; CHECK-LABEL: @foo_optsize( +; CHECK-NOT: <2 x i8> +; CHECK-NOT: <4 x i8> + entry: br label %for.body @@ -32,3 +32,28 @@ for.end: ; preds = %for.body attributes #0 = { optsize } +define i32 @foo_minsize() #1 { +; CHECK-LABEL: @foo_minsize( +; CHECK-NOT: <2 x i8> +; CHECK-NOT: <4 x i8> + +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %arrayidx = getelementptr inbounds [32 x i8], [32 x i8]* @tab, i32 0, i32 %i.08 + %0 = load i8, i8* %arrayidx, align 1 + %cmp1 = icmp eq i8 %0, 0 + %. = select i1 %cmp1, i8 2, i8 1 + store i8 %., i8* %arrayidx, align 1 + %inc = add nsw i32 %i.08, 1 + %exitcond = icmp eq i32 %i.08, 202 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret i32 0 +} + +attributes #1 = { minsize } + |
