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| author | Vladimir N. Makarov <vmakarov@redhat.com> | 2021-01-20 11:40:14 -0500 |
|---|---|---|
| committer | Vladimir N. Makarov <vmakarov@redhat.com> | 2021-01-20 11:44:04 -0500 |
| commit | 4334b524274203125193a08a8485250c41c2daa9 (patch) | |
| tree | 871af61bf1eacb30f9613f4d5261edfc9701fdbd /gcc | |
| parent | 261cdd23195bc921737fd7a44e34a93aaaaccc44 (diff) | |
| download | gcc-4334b524274203125193a08a8485250c41c2daa9.zip gcc-4334b524274203125193a08a8485250c41c2daa9.tar.gz gcc-4334b524274203125193a08a8485250c41c2daa9.tar.bz2 | |
[PR98722] LRA: Check that target has no 3-op add insn to transform 2 plus expression.
Patch cf2ac1c30af0fa783c8d72e527904dda5d8cc330 for solving PR97969 was
assumed for targets with absent 3-op add insn. But the original patch did
not check this. This patch adds the check.
gcc/ChangeLog:
PR rtl-optimization/98722
* lra-eliminations.c (eliminate_regs_in_insn): Check that target
has no 3-op add insn to transform insns containing two pluses.
gcc/testsuite/ChangeLog:
PR rtl-optimization/98722
* g++.target/s390/pr98722.C: New.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/lra-eliminations.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.target/s390/pr98722.C | 12 |
2 files changed, 16 insertions, 1 deletions
diff --git a/gcc/lra-eliminations.c b/gcc/lra-eliminations.c index ebcadd1..5b97175 100644 --- a/gcc/lra-eliminations.c +++ b/gcc/lra-eliminations.c @@ -1057,7 +1057,10 @@ eliminate_regs_in_insn (rtx_insn *insn, bool replace_p, bool first_p, reg2 = SUBREG_REG (reg2); if (REG_P (reg1) && REG_P (reg2) && REGNO (reg1) < FIRST_PSEUDO_REGISTER - && REGNO (reg2) >= FIRST_PSEUDO_REGISTER) + && REGNO (reg2) >= FIRST_PSEUDO_REGISTER + && GET_MODE (reg1) == Pmode + && !have_addptr3_insn (gen_reg_rtx (Pmode), reg1, + XEXP (XEXP (SET_SRC (set), 0), 1))) { XEXP (XEXP (SET_SRC (set), 0), 0) = op2; XEXP (SET_SRC (set), 1) = op1; diff --git a/gcc/testsuite/g++.target/s390/pr98722.C b/gcc/testsuite/g++.target/s390/pr98722.C new file mode 100644 index 0000000..64edaf3 --- /dev/null +++ b/gcc/testsuite/g++.target/s390/pr98722.C @@ -0,0 +1,12 @@ +// { dg-do compile } +// { dg-options "-Og -fno-tree-fre -fno-split-wide-types" } +struct B { + virtual void Method(); +}; +typedef void (B::*fn_type_a)(); + +int main() { + fn_type_a f(&B::Method); + B b; + (b.*f)(); +} |