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| author | Richard Biener <rguenther@suse.de> | 2022-03-16 13:39:31 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-03-16 14:00:35 +0100 |
| commit | f6fb661ea8ac7e17c6924719de6219f002c4efef (patch) | |
| tree | d564d09225f6ffcdf32d93e02a5de82bf16e5bc4 | |
| parent | 5809bb4f78c9aae0f3be3c8d942b6af75ba23a74 (diff) | |
| download | gcc-f6fb661ea8ac7e17c6924719de6219f002c4efef.zip gcc-f6fb661ea8ac7e17c6924719de6219f002c4efef.tar.gz gcc-f6fb661ea8ac7e17c6924719de6219f002c4efef.tar.bz2 | |
tree-optimization/102008 - restore if-conversion of adjacent loads
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.
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.
| -rw-r--r-- | gcc/passes.def | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/aarch64/pr102008.c | 13 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/passes.def b/gcc/passes.def index f771818..c8903b4 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 0000000..d54436c --- /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 } } */ |