Message ID | 20220316124226.CF926139BD@imap2.suse-dmz.suse.de |
---|---|
State | New |
Headers | show |
Series | tree-optimization/102008 - restore if-conversion of adjacent loads | expand |
On Wed, Mar 16, 2022 at 01:42:26PM +0100, Richard Biener wrote: > The following re-orders the newly added code sinking pass before > the last phiopt pass which performs hoisting of adjacent loads > with the intent to enable if-conversion on those. > > I've added the aarch64 specific testcase from the PR. > > Bootstrapped and tested on x86_64-unknown-linux-gnu, verified > the testcase fails/passes with a aarch64 cross. > > OK? > > Thanks, > Richard. > > 2022-03-16 Richard Biener <rguenther@suse.de> > > PR tree-optimization/102008 > * passes.def: Move the added code sinking pass before the > preceeding phiopt pass. > > * gcc.target/aarch64/pr102008.c: New testcase. Ok. Jakub
diff --git a/gcc/passes.def b/gcc/passes.def index f7718181038..c8903b4ec16 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -349,10 +349,10 @@ along with GCC; see the file COPYING3. If not see /* After late CD DCE we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_forwprop); + NEXT_PASS (pass_sink_code); NEXT_PASS (pass_phiopt, false /* early_p */); NEXT_PASS (pass_fold_builtins); NEXT_PASS (pass_optimize_widening_mul); - NEXT_PASS (pass_sink_code); NEXT_PASS (pass_store_merging); NEXT_PASS (pass_tail_calls); /* If DCE is not run before checking for uninitialized uses, diff --git a/gcc/testsuite/gcc.target/aarch64/pr102008.c b/gcc/testsuite/gcc.target/aarch64/pr102008.c new file mode 100644 index 00000000000..d54436c0ffd --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/pr102008.c @@ -0,0 +1,13 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ + +struct Foo { int a; int b; }; + +int test(int side, const struct Foo *foo) { + if (side == 1) return foo->a; + return foo->b; +} + +/* We want to if-convert the load, not the address. */ +/* { dg-final { scan-assembler-not "add" } } */ +/* { dg-final { scan-assembler-times "csel" 1 } } */