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[PR testsuite/102857] Tweak ssa-dom-thread-7.c for aarch64.

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First, ssa-dom-thread-7 was looking at a dump file that was not
being generated.  This probably happened in the detangling of the VRP
threader from VRP, and I didn't notice because the test came back as
with UNRESOLVED instead of FAIL.

Second, aarch64 gets far more threads than other architectures (20
versus 12).  The difference is sufficiently different to make the
regex awkward.

We already have special casing for aarch64 in other parts of this
test, so perhaps it's simplest to have an arch specific test
for the thread3 count.

I don't know perhaps there's a better way.  I wake up with chills in
the middle of the night thinking about this test ;-).

Tested on x86-64 Linux and aarch64 Linux.

gcc/testsuite/ChangeLog:

	PR testsuite/102857
	* gcc.dg/tree-ssa/ssa-dom-thread-7.c: Add -fdump-tree-vrp2-stats.
	Tweak for aarch64.
This commit is contained in:
Aldy Hernandez 2021-10-23 08:59:24 +02:00
parent e53fbb1783
commit 4e417eea8f
1 changed files with 3 additions and 2 deletions
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5
gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-7.c
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@ -1,7 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-thread1-stats -fdump-tree-thread2-stats -fdump-tree-dom2-stats -fdump-tree-thread3-stats -fdump-tree-dom3-stats -fdump-tree-vrp2-stats -fno-guess-branch-probability" } */
/* { dg-options "-O2 -fdump-tree-dom2-stats -fdump-tree-thread3-stats -fdump-tree-dom3-stats -fdump-tree-vrp-thread2-stats -fno-guess-branch-probability" } */
/* { dg-final { scan-tree-dump "Jumps threaded: 11" "thread3" } } */
/* { dg-final { scan-tree-dump-not "Jumps threaded" "dom2" } } */
/* aarch64 has the highest CASE_VALUES_THRESHOLD in GCC. It's high enough
@ -9,6 +8,8 @@
jump threading opportunities. Skip the later tests on aarch64. */
/* { dg-final { scan-tree-dump-not "Jumps threaded" "dom3" { target { ! aarch64*-*-* } } } } */
/* { dg-final { scan-tree-dump-not "Jumps threaded" "vrp-thread2" { target { ! aarch64*-*-* } } } } */
/* { dg-final { scan-tree-dump "Jumps threaded: 11" "thread3" { target { ! aarch64*-*-* } } } } */
/* { dg-final { scan-tree-dump "Jumps threaded: 18" "thread3" { target { aarch64*-*-* } } } } */
enum STATE {
S0=0,