Bug 24436 - (subreg:V4SF (reg:SF) 0) should be invalid RTL, happens for -mfp-math=sse
Summary: (subreg:V4SF (reg:SF) 0) should be invalid RTL, happens for -mfp-math=sse
Status: NEW
Alias: None
Product: gcc
Classification: Unclassified
Component: target (show other bugs)
Version: 4.1.0
: P2 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL:
Keywords: FIXME
Depends on:
Blocks:
 
Reported: 2005-10-18 20:12 UTC by Andrew Pinski
Modified: 2006-02-13 03:41 UTC (History)
1 user (show)

See Also:
Host:
Target: i?86-*-*, x86_64-*-*
Build:
Known to work:
Known to fail:
Last reconfirmed: 2006-02-13 03:41:44

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Description Andrew Pinski 2005-10-18 20:12:54 UTC 
From emit-rtl.c:
  /* ??? x86 sse code makes heavy use of *paradoxical* vector subregs,
     i.e. (subreg:V4SF (reg:SF) 0).  This surely isn't the cleanest way to
     represent this.  It's questionable if this ought to be represented at
     all -- why can't this all be hidden in post-reload splitters that make
     arbitrarily mode changes to the registers themselves.  */
Comment 1 Andrew Pinski 2005-11-12 05:38:04 UTC 
Confirmed.