diff options
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-9.5/0039-process_alt_operands-Don-t-match-user-defined-regs-o.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-9.5/0039-process_alt_operands-Don-t-match-user-defined-regs-o.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-9.5/0039-process_alt_operands-Don-t-match-user-defined-regs-o.patch b/meta/recipes-devtools/gcc/gcc-9.5/0039-process_alt_operands-Don-t-match-user-defined-regs-o.patch new file mode 100644 index 0000000000..b69114d1e5 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-9.5/0039-process_alt_operands-Don-t-match-user-defined-regs-o.patch @@ -0,0 +1,100 @@ +From e75bcc2ec4f1e7e081ce18713f0a25913ba15340 Mon Sep 17 00:00:00 2001 +From: Vladimir Makarov <vmakarov@redhat.com> +Date: Wed, 10 Jul 2019 16:07:10 +0000 +Subject: [PATCH 39/39] process_alt_operands: Don't match user defined regs + only if they are early clobbers + +PR target/91102 (aarch64 ICE on Linux kernel with -Os starting with r270266) + +2019-07-10 Vladimir Makarov <vmakarov@redhat.com> + + PR target/91102 + * lra-constraints.c (process_alt_operands): Don't match user + defined regs only if they are early clobbers. + +2019-07-10 Vladimir Makarov <vmakarov@redhat.com> + + PR target/91102 + * gcc.target/aarch64/pr91102.c: New test. + +From-SVN: r273357 +Upstream-Status: Backport [https://github.com/gcc-mirror/gcc/commit/613caed2feb9cfc8158308670b59df3d031ec629] +[takondra: dropped conflicting ChangeLog changes] +Signed-off-by: Taras Kondratiuk <takondra@cisco.com> +--- + gcc/lra-constraints.c | 17 ++++++++++---- + gcc/testsuite/gcc.target/aarch64/pr91102.c | 26 ++++++++++++++++++++++ + 2 files changed, 39 insertions(+), 4 deletions(-) + create mode 100644 gcc/testsuite/gcc.target/aarch64/pr91102.c + +diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c +index cf33da8013e..6382dbf852b 100644 +--- a/gcc/lra-constraints.c ++++ b/gcc/lra-constraints.c +@@ -2172,8 +2172,9 @@ process_alt_operands (int only_alternative) + else + { + /* Operands don't match. If the operands are +- different user defined explicit hard registers, +- then we cannot make them match. */ ++ different user defined explicit hard ++ registers, then we cannot make them match ++ when one is early clobber operand. */ + if ((REG_P (*curr_id->operand_loc[nop]) + || SUBREG_P (*curr_id->operand_loc[nop])) + && (REG_P (*curr_id->operand_loc[m]) +@@ -2192,9 +2193,17 @@ process_alt_operands (int only_alternative) + && REG_P (m_reg) + && HARD_REGISTER_P (m_reg) + && REG_USERVAR_P (m_reg)) +- break; ++ { ++ int i; ++ ++ for (i = 0; i < early_clobbered_regs_num; i++) ++ if (m == early_clobbered_nops[i]) ++ break; ++ if (i < early_clobbered_regs_num ++ || early_clobber_p) ++ break; ++ } + } +- + /* Both operands must allow a reload register, + otherwise we cannot make them match. */ + if (curr_alt[m] == NO_REGS) +diff --git a/gcc/testsuite/gcc.target/aarch64/pr91102.c b/gcc/testsuite/gcc.target/aarch64/pr91102.c +new file mode 100644 +index 00000000000..70b99045a48 +--- /dev/null ++++ b/gcc/testsuite/gcc.target/aarch64/pr91102.c +@@ -0,0 +1,26 @@ ++/* PR target/91102 */ ++/* { dg-do compile } */ ++/* { dg-options "-O2" } */ ++ ++int ++foo (long d, long l) ++{ ++ register long e asm ("x1") = d; ++ register long f asm("x2") = l; ++ asm ("" : : "r" (e), "r" (f)); ++ return 3; ++} ++ ++struct T { int i; int j; }; ++union S { long h; struct T t; }; ++ ++void ++bar (union S b) ++{ ++ while (1) ++ { ++ union S c = b; ++ c.t.j++; ++ b.h = foo (b.h, c.h); ++ } ++} +-- +2.25.1 + |