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[gcn] Fix build with RTL checking [PR94248]

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Building (for offloading) a '--target=amdgcn-amdhsa' GCC with
'--enable-checking=yes,extra,rtl' fails:

    during RTL pass: split2
    [...]/source-gcc/libgcc/libgcc2.c: In function '__absvdi2':
    [...]/source-gcc/libgcc/libgcc2.c:271:1: internal compiler error: RTL check: expected code 'reg', have 'const_int' in rhs_regno, at rtl.h:1923
      271 | }
	  | ^
    0x565847 ???
	    [...]/source-gcc/gcc/rtl.c:881
    0x59a8a4 ???
	    [...]/source-gcc/gcc/rtl.h:1923
    0x12e3a5c ???
	    [...]/source-gcc/gcc/config/gcn/gcn.md:631
    [...]
    Makefile:501: recipe for target '_absvdi2.o' failed
    make[4]: *** [_absvdi2.o] Error 1
    make[4]: Leaving directory '[...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/gfx900/libgcc'

	gcc/
	PR target/94248
	* config/gcn/gcn.md (*mov<mode>_insn): Use
	'reg_overlap_mentioned_p' to check for overlap.

Tested-by: Thomas Schwinge <thomas@codesourcery.com>
This commit is contained in:
Jakub Jelinek 2020-03-21 14:39:56 +00:00 committed by Thomas Schwinge
parent afa3d80e86
commit ccf93cd0b2
2 changed files with 5 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2020-04-29 Jakub Jelinek <jakub@redhat.com>
PR target/94248
* config/gcn/gcn.md (*mov<mode>_insn): Use
'reg_overlap_mentioned_p' to check for overlap.
PR target/94706
* config/ia64/ia64.c (hfa_element_mode): Use DECL_FIELD_ABI_IGNORED
instead of cxx17_empty_base_field_p.

2
gcc/config/gcn/gcn.md
View File

@ -629,7 +629,7 @@
rtx outhi = gen_highpart_mode (SImode, <MODE>mode, operands[0]);
/* Ensure that overlapping registers aren't corrupted. */
if (REGNO (outlo) == REGNO (inhi))
if (reg_overlap_mentioned_p (outlo, inhi))
{
operands[0] = outhi;
operands[1] = inhi;