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| author | Ludovic Courtès <ludo@gnu.org> | 2016-09-09 15:22:45 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-09-12 18:20:50 +0200 |
| commit | e7e43727ce7b3426a31b2f50b035a5b0aba61d52 (patch) | |
| tree | 6fda0b61a2832e7a545c206259f2ba4eca90f726 /gnu/packages/patches/gcc-arm-bug-71399.patch | |
| parent | 24f2334e367e6218617f21e3abb287b211a1dcd1 (diff) | |
| download | guix-patches-e7e43727ce7b3426a31b2f50b035a5b0aba61d52.tar guix-patches-e7e43727ce7b3426a31b2f50b035a5b0aba61d52.tar.gz | |
gnu: gcc: Work around ARM bootstrapping failure (GCC bug #71399).
* gnu/packages/patches/gcc-arm-bug-71399.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gcc.scm (gcc-4.9)[source]: Use it.
Diffstat (limited to 'gnu/packages/patches/gcc-arm-bug-71399.patch')
| -rw-r--r-- | gnu/packages/patches/gcc-arm-bug-71399.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gnu/packages/patches/gcc-arm-bug-71399.patch b/gnu/packages/patches/gcc-arm-bug-71399.patch new file mode 100644 index 0000000000..6f04fece0e --- /dev/null +++ b/gnu/packages/patches/gcc-arm-bug-71399.patch @@ -0,0 +1,55 @@ +Revert the following commit to work around a bootstrap comparison failure on +ARMv7, as reported at <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71399>. + +commit f6ab85b7049a03962ea98924d00802da357a1ad3 +Author: renlin <renlin@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Wed Dec 2 14:06:31 2015 +0000 + + [PR67383][ARM][4.9]Backport of "Allow any register for DImode values in Thumb2" + + This partially fix PR67383. It allows the reload more flexibility to choose + spilling pseudo registers. + + + gcc/ChangeLog: + + 2015-12-02 Renlin Li <renlin.li@arm.com> + + Backport from mainline. + 2014-04-22 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> + + * config/arm/arm.c (arm_hard_regno_mode_ok): Loosen + restrictions on core registers for DImode values in Thumb2. + + + git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@231177 138bc75d-0d04-0410-961f-82ee72b054a4 + +diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c +index 8ba6060..d9028a1 100644 +--- b/gcc/config/arm/arm.c ++++ a/gcc/config/arm/arm.c +@@ -22624,19 +22624,12 @@ + } + + /* We allow almost any value to be stored in the general registers. +- Restrict doubleword quantities to even register pairs in ARM state +- so that we can use ldrd. Do not allow very large Neon structure +- opaque modes in general registers; they would use too many. */ ++ Restrict doubleword quantities to even register pairs so that we can ++ use ldrd. Do not allow very large Neon structure opaque modes in ++ general registers; they would use too many. */ + if (regno <= LAST_ARM_REGNUM) +- { +- if (ARM_NUM_REGS (mode) > 4) +- return FALSE; +- +- if (TARGET_THUMB2) +- return TRUE; +- +- return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0); +- } ++ return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0) ++ && ARM_NUM_REGS (mode) <= 4; + + if (regno == FRAME_POINTER_REGNUM + || regno == ARG_POINTER_REGNUM) |