diff options
author | Alexey Bataev <a.bataev@hotmail.com> | 2014-04-15 09:37:30 +0000 |
---|---|---|
committer | Alexey Bataev <a.bataev@hotmail.com> | 2014-04-15 09:37:30 +0000 |
commit | 15cbb64eb4bb19e3b21e1c75af3096bced18eb2a (patch) | |
tree | 9c850430cd3a54474c5db76350e83ae87baf9b46 /test/Transforms/LoopVectorize | |
parent | 47b284ce3539ef216e0ab994f4b7d762cfb1c69a (diff) | |
download | llvm-15cbb64eb4bb19e3b21e1c75af3096bced18eb2a.tar.gz llvm-15cbb64eb4bb19e3b21e1c75af3096bced18eb2a.tar.bz2 llvm-15cbb64eb4bb19e3b21e1c75af3096bced18eb2a.tar.xz |
D3348 - [BUG] "Rotate Loop" pass kills "llvm.vectorizer.enable" metadata
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206266 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopVectorize')
-rw-r--r-- | test/Transforms/LoopVectorize/vect.omp.persistence.ll | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/vect.omp.persistence.ll b/test/Transforms/LoopVectorize/vect.omp.persistence.ll new file mode 100644 index 0000000000..4a29a2dea1 --- /dev/null +++ b/test/Transforms/LoopVectorize/vect.omp.persistence.ll @@ -0,0 +1,87 @@ +; RUN: opt < %s -O2 -force-vector-unroll=2 -force-vector-width=4 -debug-only=loop-vectorize -stats -S 2>&1 | FileCheck %s + +; Loop from "rotated" +; CHECK: LV: Loop hints: force=enabled +; Loop from "nonrotated" +; CHECK: LV: Loop hints: force=enabled +; No more loops in the module +; CHECK-NOT: LV: Loop hints: force= +; In total only 1 loop should be rotated. +; CHECK: 1 loop-rotate + +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-S128" +target triple = "x86_64-unknown-linux-gnu" + +; See http://reviews.llvm.org/D3348 for details. + +; +; Test #1 +; +; Ensure that "llvm.vectorizer.enable" metadata was not lost prior to LoopVectorize pass. +; In past LoopRotate was clearing that metadata. +; +; The source C code is: +; void rotated(float *a, int size) +; { +; int t = 0; +; #pragma omp simd +; for (int i = 0; i < size; ++i) { +; a[i] = a[i-5] * a[i+2]; +; ++t; +; } +;} + +define void @rotated(float* nocapture %a, i64 %size) { +entry: + %cmp1 = icmp sgt i64 %size, 0 + br i1 %cmp1, label %for.header, label %for.end + +for.header: + %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] + %cmp2 = icmp sgt i64 %indvars.iv, %size + br i1 %cmp2, label %for.end, label %for.body + +for.body: + + %0 = add nsw i64 %indvars.iv, -5 + %arrayidx = getelementptr inbounds float* %a, i64 %0 + %1 = load float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !1 + %2 = add nsw i64 %indvars.iv, 2 + %arrayidx2 = getelementptr inbounds float* %a, i64 %2 + %3 = load float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !1 + %mul = fmul float %1, %3 + %arrayidx4 = getelementptr inbounds float* %a, i64 %indvars.iv + store float %mul, float* %arrayidx4, align 4, !llvm.mem.parallel_loop_access !1 + + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + br label %for.header, !llvm.loop !1 + +for.end: + ret void +} + +!1 = metadata !{metadata !1, metadata !2} +!2 = metadata !{metadata !"llvm.vectorizer.enable", i1 true} + +; +; Test #2 +; +; Ensure that "llvm.vectorizer.enable" metadata was not lost even +; if loop was not rotated (see http://reviews.llvm.org/D3348#comment-4). +; +define i32 @nonrotated(i32 %a) { +entry: + br label %loop_cond +loop_cond: + %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ] + %cmp = icmp ne i32 %indx, %a + br i1 %cmp, label %return, label %loop_inc +loop_inc: + %inc = add i32 %indx, 1 + br label %loop_cond, !llvm.loop !3 +return: + ret i32 0 +} + +!3 = metadata !{metadata !3, metadata !4} +!4 = metadata !{metadata !"llvm.vectorizer.enable", i1 true} |