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Bug 56382 - FAIL: gcc.c-torture/compile/pr55921.c (internal compiler error)
Summary: FAIL: gcc.c-torture/compile/pr55921.c (internal compiler error)
Status: RESOLVED DUPLICATE of bug 55943
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: 4.8.0
: P3 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
Depends on:
Reported: 2013-02-18 18:24 UTC by John David Anglin
Modified: 2014-03-27 01:04 UTC (History)
0 users

See Also:
Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa64-hp-hpux11.11
Known to work:
Known to fail:
Last reconfirmed:

Patch (504 bytes, text/plain)
2013-02-18 18:34 UTC, John David Anglin
Patch (285 bytes, patch)
2013-07-25 16:35 UTC, John David Anglin
Details | Diff

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Description John David Anglin 2013-02-18 18:24:11 UTC
This is a problem extracting the first subreg from a SCmode value.  Thia
occurs during reload after the point where pseudos can be created but we
need a pseudo to extract the subreg.  The problem is SCmode is the same
size as DImode on this target, so the subreg can't be extracted by a move.

I marked this a middle-end bug as the documentation indicates that complex
values are handled by it.
Comment 1 John David Anglin 2013-02-18 18:34:54 UTC
Created attachment 29485 [details]

I tried the above changes to expmed.c but this
approach eventually reaches a gcc_unreacheable
dead end.
Comment 2 John David Anglin 2013-07-25 16:32:42 UTC
Executing on host: /mnt/gnu/gcc/objdir-test/gcc/xgcc -B/mnt/gnu/gcc/objdir-test/
gcc/  -fno-diagnostics-show-caret   -O0  -w -c  -o pr55921.o /mnt/gnu/gcc/gcc/gc
c/testsuite/gcc.c-torture/compile/pr55921.c    (timeout = 300)spawn /mnt/gnu/gcc/objdir-test/gcc/xgcc -B/mnt/gnu/gcc/objdir-test/gcc/ -fno-diagnostics-show-caret -O0 -w -c -o pr55921.o /mnt/gnu/gcc/gcc/gcc/testsuite/gcc.c-
torture/compile/pr55921.c/mnt/gnu/gcc/gcc/gcc/testsuite/gcc.c-torture/compile/pr55921.c: In function 'foo':
/mnt/gnu/gcc/gcc/gcc/testsuite/gcc.c-torture/compile/pr55921.c:21:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:866
Comment 3 John David Anglin 2013-07-25 16:35:30 UTC
Created attachment 30555 [details]

Works for me.
Comment 4 Eric Botcazou 2013-09-02 16:19:23 UTC
Author: ebotcazou
Date: Mon Sep  2 16:19:20 2013
New Revision: 202179

	PR middle-end/56382
	* expr.c (emit_move_complex): Do not move complex FP values as parts if
	the source or the destination is a single hard register.

Comment 5 John David Anglin 2014-03-27 01:04:38 UTC
This is fixed for hppa on trunk but not 4.8 branch.

*** This bug has been marked as a duplicate of bug 55943 ***