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| author | liuhongt <hongtao.liu@intel.com> | 2021-09-06 17:09:38 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2021-09-06 18:57:46 +0800 |
| commit | 93e6809459f34ca7b5928f1729246b2e9dfb3eb4 (patch) | |
| tree | 3e78f62b1f520c7e20b228a3bc194232a667ee8a /gcc/optabs.c | |
| parent | 086bb917d6efa32d9841c34a3b762f4278c762cd (diff) | |
| download | gcc-93e6809459f34ca7b5928f1729246b2e9dfb3eb4.zip gcc-93e6809459f34ca7b5928f1729246b2e9dfb3eb4.tar.gz gcc-93e6809459f34ca7b5928f1729246b2e9dfb3eb4.tar.bz2 | |
Avoid FROM being overwritten in expand_fix.
For the conversion from _Float16 to int, if the corresponding optab
does not exist, the compiler will try the wider mode (SFmode here),
but when floatsfsi exists but FAIL, FROM will be rewritten, which
leads to a PR runtime error.
gcc/ChangeLog:
PR middle-end/102182
* optabs.c (expand_fix): Add from1 to avoid from being
overwritten.
gcc/testsuite/ChangeLog:
PR middle-end/102182
* gcc.target/i386/pr101282.c: New test.
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index ebed78f..019bbb6 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -5488,20 +5488,21 @@ expand_fix (rtx to, rtx from, int unsignedp) if (icode != CODE_FOR_nothing) { rtx_insn *last = get_last_insn (); + rtx from1 = from; if (fmode != GET_MODE (from)) - from = convert_to_mode (fmode, from, 0); + from1 = convert_to_mode (fmode, from, 0); if (must_trunc) { - rtx temp = gen_reg_rtx (GET_MODE (from)); - from = expand_unop (GET_MODE (from), ftrunc_optab, from, - temp, 0); + rtx temp = gen_reg_rtx (GET_MODE (from1)); + from1 = expand_unop (GET_MODE (from1), ftrunc_optab, from1, + temp, 0); } if (imode != GET_MODE (to)) target = gen_reg_rtx (imode); - if (maybe_emit_unop_insn (icode, target, from, + if (maybe_emit_unop_insn (icode, target, from1, doing_unsigned ? UNSIGNED_FIX : FIX)) { if (target != to) |