* [AArch64, committed] Fix label mode
@ 2017-08-22 9:25 Richard Sandiford
0 siblings, 0 replies; only message in thread
From: Richard Sandiford @ 2017-08-22 9:25 UTC (permalink / raw)
To: gcc-patches
This patch fixes a case where we tried to force a VOIDmode label
into a DImode register, which led to invalid rtl that was previously
undiagnosed.
Tested on aarch64-linux-gnu and applied as obvious.
Richard
2017-08-22 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* config/aarch64/aarch64.md (casesi): Use DImode rather than
VOIDmode for the LABEL_REF.
Index: gcc/config/aarch64/aarch64.md
===================================================================
--- gcc/config/aarch64/aarch64.md 2017-08-22 10:11:45.067177420 +0100
+++ gcc/config/aarch64/aarch64.md 2017-08-22 10:13:02.285442249 +0100
@@ -498,7 +498,7 @@ (define_expand "casesi"
const0_rtx),
operands[0], operands[2], operands[4]));
- operands[2] = force_reg (DImode, gen_rtx_LABEL_REF (VOIDmode, operands[3]));
+ operands[2] = force_reg (DImode, gen_rtx_LABEL_REF (DImode, operands[3]));
emit_jump_insn (gen_casesi_dispatch (operands[2], operands[0],
operands[3]));
DONE;
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