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| author | Felix Fietkau <nbd@openwrt.org> | 2011-03-04 21:38:15 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2011-03-04 21:38:15 +0000 |
| commit | 3f3a1e406d84db876fafda826f1dbd46a8c2647f (patch) | |
| tree | b7657e7918e43d4306140df7dfacf5749e018cd0 /toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch | |
| parent | 020319a7cc425efb1098aad3936282c04f73510c (diff) | |
| download | master-187ad058-3f3a1e406d84db876fafda826f1dbd46a8c2647f.tar.gz master-187ad058-3f3a1e406d84db876fafda826f1dbd46a8c2647f.tar.bz2 master-187ad058-3f3a1e406d84db876fafda826f1dbd46a8c2647f.zip | |
toolchain/gcc (linaro): fix extension elimination optimization
This applies Richard Sandiford's patch for Linaro GCC as an alternative to disabling the Linaro-specific extension elimination optimization altogether.
Original patch: https://bugs.launchpad.net/gcc-linaro/+bug/728315
Signed-off-by: Mark Mentovai <mark@moxienet.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25871 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch')
| -rw-r--r-- | toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch b/toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch new file mode 100644 index 0000000000..387e02a789 --- /dev/null +++ b/toolchain/gcc/patches/linaro/860-fix_extension_elimination.patch @@ -0,0 +1,18 @@ +https://bugs.launchpad.net/gcc-linaro/+bug/728315 +https://lists.openwrt.org/pipermail/openwrt-devel/2011-March/009847.html + +--- a/gcc/ee.c ++++ b/gcc/ee.c +@@ -209,7 +209,11 @@ + + *regno = REGNO (reg); + +- if (paradoxical_subreg_p (use)) ++ /* Non-paradoxical SUBREGs of promoted vars guarantee that the ++ upper (elided) bits of the inner register have a particular value. ++ For our purposes, such SUBREGs act as a full reference to the ++ inner register. */ ++ if (paradoxical_subreg_p (use) || SUBREG_PROMOTED_VAR_P (use)) + *size = GET_MODE_BITSIZE (GET_MODE (reg)); + else + *size = subreg_lsb (use) + GET_MODE_BITSIZE (GET_MODE (use)); |