ira: Make sure allocno copies are ordered [PR98791]
gcc/ChangeLog: 2021-02-22 Andre Vieira <andre.simoesdiasvieira@arm.com> PR rtl-optimization/98791 * ira-conflicts.c (process_regs_for_copy): Don't create allocno copies for unordered modes. gcc/testsuite/ChangeLog: 2021-02-22 Andre Vieira <andre.simoesdiasvieira@arm.com> PR rtl-optimization/98791 * gcc.target/aarch64/sve/pr98791.c: New test.
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@ -275,7 +275,10 @@ process_regs_for_copy (rtx reg1, rtx reg2, bool constraint_p,
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ira_allocno_t a1 = ira_curr_regno_allocno_map[REGNO (reg1)];
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ira_allocno_t a2 = ira_curr_regno_allocno_map[REGNO (reg2)];
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if (!allocnos_conflict_for_copy_p (a1, a2) && offset1 == offset2)
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if (!allocnos_conflict_for_copy_p (a1, a2)
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&& offset1 == offset2
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&& ordered_p (GET_MODE_PRECISION (ALLOCNO_MODE (a1)),
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GET_MODE_PRECISION (ALLOCNO_MODE (a2))))
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{
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cp = ira_add_allocno_copy (a1, a2, freq, constraint_p, insn,
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ira_curr_loop_tree_node);
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@ -0,0 +1,12 @@
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/* PR rtl-optimization/98791 */
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/* { dg-do compile } */
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/* { dg-options "-O -ftree-vectorize" } */
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#include <arm_sve.h>
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extern char a[11];
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extern long b[];
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void f() {
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for (int d; d < 10; d++) {
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a[d] = svaddv(svptrue_b8(), svdup_u8(0));
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b[d] = 0;
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}
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}
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