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From: Andrew Macleod <amacleod@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-3334] Add 3 floating NAN tests. Date: Mon, 17 Oct 2022 13:25:06 +0000 (GMT) [thread overview] Message-ID: <20221017132506.47ED03858293@sourceware.org> (raw) https://gcc.gnu.org/g:7896a31d3003bad8b845881f59e570fbc3c78cfa commit r13-3334-g7896a31d3003bad8b845881f59e570fbc3c78cfa Author: Aldy Hernandez <aldyh@redhat.com> Date: Mon Oct 10 11:01:48 2022 +0200 Add 3 floating NAN tests. x UNORD x should set NAN on the TRUE side. The false side of x == x should set NAN. The true side of x != x should set NAN. gcc/testsuite/ * gcc.dg/tree-ssa/vrp-float-3a.c: New. * gcc.dg/tree-ssa/vrp-float-4a.c: New. * gcc.dg/tree-ssa/vrp-float-5a.c: New. Diff: --- gcc/testsuite/gcc.dg/tree-ssa/vrp-float-3a.c | 19 +++++++++++++++++++ gcc/testsuite/gcc.dg/tree-ssa/vrp-float-4a.c | 23 +++++++++++++++++++++++ gcc/testsuite/gcc.dg/tree-ssa/vrp-float-5a.c | 16 ++++++++++++++++ 3 files changed, 58 insertions(+) diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-3a.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-3a.c new file mode 100644 index 00000000000..5aadaa7c4db --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-3a.c @@ -0,0 +1,19 @@ +// { dg-do compile } +// { dg-options "-O2 -fno-thread-jumps -fdisable-tree-fre1 -fdump-tree-evrp" } + +void link_error (); +void bar (); + +float +foo (float x) +{ + if (x != x) + { + // The true side of x != x implies NAN, so we should be able to + // fold this. + if (!__builtin_isnan (x)) + link_error (); + } +} + +// { dg-final { scan-tree-dump-not "link_error" "evrp" } } diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-4a.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-4a.c new file mode 100644 index 00000000000..7d3187b3962 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-4a.c @@ -0,0 +1,23 @@ +// { dg-do compile } +// { dg-options "-O2 -fno-thread-jumps -fdisable-tree-fre1 -fdump-tree-evrp" } + +void link_error (); +void bar (); + +float +foo (float x) +{ + if (x == x) + { + bar (); + } + else + { + // The false side of x == x implies NAN, so we should be able to + // fold this. + if (!__builtin_isnan (x)) + link_error (); + } +} + +// { dg-final { scan-tree-dump-not "link_error" "evrp" } } diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-5a.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-5a.c new file mode 100644 index 00000000000..08332305f2c --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp-float-5a.c @@ -0,0 +1,16 @@ +// { dg-do compile } +// { dg-options "-O2 -fno-thread-jumps -fdisable-tree-fre1 -fdump-tree-evrp" } + +void link_error (); + +float +foo (float x) +{ + if (__builtin_isnan (x)) + { + if (!__builtin_isnan (x)) + link_error (); + } +} + +// { dg-final { scan-tree-dump-not "link_error" "evrp" } }
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