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| author | Vladimir N. Makarov <vmakarov@redhat.com> | 2022-02-17 11:31:50 -0500 |
|---|---|---|
| committer | Vladimir N. Makarov <vmakarov@redhat.com> | 2022-02-17 11:33:33 -0500 |
| commit | db69f666a728ce800a840115829f6b64bc3174d2 (patch) | |
| tree | 62310bd45e01350d134b523b447a7651e2c2c225 | |
| parent | 6bbd8afee0036c274f5ebb5b48d6fdc2091bd046 (diff) | |
| download | gcc-db69f666a728ce800a840115829f6b64bc3174d2.zip gcc-db69f666a728ce800a840115829f6b64bc3174d2.tar.gz gcc-db69f666a728ce800a840115829f6b64bc3174d2.tar.bz2 | |
[PR104447] LRA: Do not split non-alloc hard regs.
LRA tried to split non-allocated hard reg for reload pseudos again and
again until number of assignment passes reaches the limit. The patch fixes
this.
gcc/ChangeLog:
PR rtl-optimization/104447
* lra-constraints.cc (spill_hard_reg_in_range): Initiate ignore
hard reg set by lra_no_alloc_regs.
gcc/testsuite/ChangeLog:
PR rtl-optimization/104447
* gcc.target/i386/pr104447.c: New.
| -rw-r--r-- | gcc/lra-constraints.cc | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr104447.c | 14 |
2 files changed, 15 insertions, 1 deletions
diff --git a/gcc/lra-constraints.cc b/gcc/lra-constraints.cc index c700c3f..b2c4590 100644 --- a/gcc/lra-constraints.cc +++ b/gcc/lra-constraints.cc @@ -6008,7 +6008,7 @@ spill_hard_reg_in_range (int regno, enum reg_class rclass, rtx_insn *from, rtx_i HARD_REG_SET ignore; lra_assert (from != NULL && to != NULL); - CLEAR_HARD_REG_SET (ignore); + ignore = lra_no_alloc_regs; EXECUTE_IF_SET_IN_BITMAP (&lra_reg_info[regno].insn_bitmap, 0, uid, bi) { lra_insn_recog_data_t id = lra_insn_recog_data[uid]; diff --git a/gcc/testsuite/gcc.target/i386/pr104447.c b/gcc/testsuite/gcc.target/i386/pr104447.c new file mode 100644 index 0000000..bf11e86 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr104447.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -pg" } */ + +int +bar (int x) +{ + asm goto ("" : : "r" (x), "r" (x + 1), "r" (x + 2), "r" (x + 3), /* { dg-error "operand has impossible constraints" } */ + "r" (x + 4), "r" (x + 5), "r" (x + 6), "r" (x + 7), + "r" (x + 8), "r" (x + 9), "r" (x + 10), "r" (x + 11), + "r" (x + 12), "r" (x + 13), "r" (x + 14), "r" (x + 15), + "r" (x + 16) : : lab); + lab: + return 0; +} |