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| author | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2016-11-17 14:22:17 +0000 |
|---|---|---|
| committer | William Schmidt <wschmidt@gcc.gnu.org> | 2016-11-17 14:22:17 +0000 |
| commit | 54e63f002885fb595f17f39998e93bb9fc23a49d (patch) | |
| tree | 08a821e036a22a2795343954aab882f7c8e78e47 /gcc | |
| parent | 2fe3721128b991538b5a416ca1d8671901d0a1f1 (diff) | |
| download | gcc-54e63f002885fb595f17f39998e93bb9fc23a49d.zip gcc-54e63f002885fb595f17f39998e93bb9fc23a49d.tar.gz gcc-54e63f002885fb595f17f39998e93bb9fc23a49d.tar.bz2 | |
re PR tree-optimization/77848 (Gimple if-conversion results in redundant comparisons)
[gcc]
2016-11-17 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/77848
* tree-if-conv.c (tree_if_conversion): Always version loops unless
the user specified -ftree-loop-if-convert.
[gcc/testsuite]
2016-11-17 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/77848
* gfortran.dg/vect/pr77848.f: New test.
Co-Authored-By: Richard Biener <rguenther@suse.de>
From-SVN: r242550
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gfortran.dg/vect/pr77848.f | 24 | ||||
| -rw-r--r-- | gcc/tree-if-conv.c | 10 |
4 files changed, 44 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8797a21..b9b3b8a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2016-11-17 Bill Schmidt <wschmidt@linux.vnet.ibm.com> + Richard Biener <rguenther@suse.de> + + PR tree-optimization/77848 + * tree-if-conv.c (tree_if_conversion): Always version loops unless + the user specified -ftree-loop-if-convert. + 2016-11-17 Bernd Edlinger <bernd.edlinger@hotmail.de> PR target/77308 @@ -116,6 +123,7 @@ * rtl.h: Declare gt_ggc_mx and gt_pch_nx. 2016-11-16 Bill Schmidt <wschmidt@linux.vnet.ibm.com> + Richard Biener <rguenther@suse.de> PR tree-optimization/77848 * tree-if-conv.c (version_loop_for_if_conversion): When versioning diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index e16f2d0..bd76620 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2016-11-17 Bill Schmidt <wschmidt@linux.vnet.ibm.com> + Richard Biener <rguenther@suse.de> + + PR tree-optimization/77848 + * gfortran.dg/vect/pr77848.f: New test. + 2016-11-17 Bernd Edlinger <bernd.edlinger@hotmail.de> PR target/77308 diff --git a/gcc/testsuite/gfortran.dg/vect/pr77848.f b/gcc/testsuite/gfortran.dg/vect/pr77848.f new file mode 100644 index 0000000..d54676e --- /dev/null +++ b/gcc/testsuite/gfortran.dg/vect/pr77848.f @@ -0,0 +1,24 @@ +! PR 77848: Verify versioning is on when vectorization fails +! { dg-do compile } +! { dg-options "-O3 -ffast-math -fdump-tree-ifcvt -fdump-tree-vect-details" } + + subroutine sub(x,a,n,m) + implicit none + real*8 x(*),a(*),atemp + integer i,j,k,m,n + real*8 s,t,u,v + do j=1,m + atemp=0.d0 + do i=1,n + if (abs(a(i)).gt.atemp) then + atemp=a(i) + k = i + end if + enddo + call dummy(atemp,k) + enddo + return + end + +! { dg-final { scan-tree-dump "LOOP_VECTORIZED" "ifcvt" } } +! { dg-final { scan-tree-dump "vectorized 0 loops in function" "vect" } } diff --git a/gcc/tree-if-conv.c b/gcc/tree-if-conv.c index dc97fc4..1235faf 100644 --- a/gcc/tree-if-conv.c +++ b/gcc/tree-if-conv.c @@ -2803,10 +2803,12 @@ tree_if_conversion (struct loop *loop) || loop->dont_vectorize)) goto cleanup; - /* Either version this loop, or if the pattern is right for outer-loop - vectorization, version the outer loop. In the latter case we will - still if-convert the original inner loop. */ - if ((any_pred_load_store || any_complicated_phi) + /* Since we have no cost model, always version loops unless the user + specified -ftree-loop-if-convert. Either version this loop, or if + the pattern is right for outer-loop vectorization, version the + outer loop. In the latter case we will still if-convert the + original inner loop. */ + if (flag_tree_loop_if_convert != 1 && !version_loop_for_if_conversion (versionable_outer_loop_p (loop_outer (loop)) ? loop_outer (loop) : loop)) |