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| author | Aldy Hernandez <aldyh@redhat.com> | 2022-10-05 20:23:15 +0200 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@redhat.com> | 2022-10-10 11:39:42 +0200 |
| commit | 98ad452728f51d6f44c7ff71e3d20c6c1dca20fd (patch) | |
| tree | c1c9dd3ec59576e070deb906741388e0974f49d5 /gcc/value-range.h | |
| parent | 9b8520fa9d745b3a974d5eb98cb4b9a9021b215d (diff) | |
| download | gcc-98ad452728f51d6f44c7ff71e3d20c6c1dca20fd.zip gcc-98ad452728f51d6f44c7ff71e3d20c6c1dca20fd.tar.gz gcc-98ad452728f51d6f44c7ff71e3d20c6c1dca20fd.tar.bz2 | |
Add op1_range for __builtin_signbit.
This is the op1_range range-op entry for __builtin_signbit. It allows
us to wind back through a call to signbit.
For example, on the true side of if (__builtin_signbit(x_5) != 0) we
can crop down the range of x_5 to:
[frange] float [-Inf, -0.0 (-0x0.0p+0)] -NAN
Similarly on the false side, we can crop to:
[frange] float [0.0 (0x0.0p+0), +Inf] +NAN
Tested on x86-64 Linux.
gcc/ChangeLog:
* gimple-range-op.cc: Add op1_range entry for __builtin_signbit.
gcc/testsuite/ChangeLog:
* gcc.dg/tree-ssa/vrp-float-signbit-3.c: New test.
Diffstat (limited to 'gcc/value-range.h')
0 files changed, 0 insertions, 0 deletions