28 lines
1.1 KiB
Diff
28 lines
1.1 KiB
Diff
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This backport contains 1 patch from gcc main stream tree.
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The commit id of these patchs list as following in the order of time.
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0001-PR92303-Try-to-simplify-memory-subreg.patch
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a4504f32c056db781a2bdc104dffa1b29684c930
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diff -uprN a/gcc/lra-spills.c b/gcc/lra-spills.c
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--- a/gcc/lra-spills.c
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+++ b/gcc/lra-spills.c
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@@ -421,7 +421,16 @@ remove_pseudos (rtx *loc, rtx_insn *insn)
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if (*loc == NULL_RTX)
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return res;
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code = GET_CODE (*loc);
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- if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER
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+ if (code == SUBREG && REG_P (SUBREG_REG (*loc)))
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+ {
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+ /* Try to remove memory subregs to simplify LRA job
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+ and avoid LRA cycling in case of subreg memory reload. */
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+ res = remove_pseudos (&SUBREG_REG (*loc), insn);
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+ if (GET_CODE (SUBREG_REG (*loc)) == MEM)
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+ alter_subreg (loc, false);
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+ return res;
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+ }
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+ else if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER
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&& lra_get_regno_hard_regno (i) < 0
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/* We do not want to assign memory for former scratches because
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it might result in an address reload for some targets. In
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