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| author | Peter Bergner <bergner@linux.ibm.com> | 2020-04-16 23:26:41 -0500 |
|---|---|---|
| committer | Peter Bergner <bergner@linux.ibm.com> | 2020-04-16 23:26:41 -0500 |
| commit | dd75498db79675a1a0b73c25e5f110969ee72d9d (patch) | |
| tree | 2a922265561c7abda125081907967a1ef97345cf /gcc/config | |
| parent | 5fb9a619eee6632f89d9d8df1515addb9a4a6404 (diff) | |
| download | gcc-dd75498db79675a1a0b73c25e5f110969ee72d9d.zip gcc-dd75498db79675a1a0b73c25e5f110969ee72d9d.tar.gz gcc-dd75498db79675a1a0b73c25e5f110969ee72d9d.tar.bz2 | |
rs6000: Fix ICE in decompose_normal_address. [PR93974]
Fix an ICE in decompose_normal_address(), which cannot handle Altivec AND:
addresses, by disallowing them via implementing the target hook
rs6000_cannot_substitute_mem_equiv_p.
gcc/
PR rtl-optimization/93974
* config/rs6000/rs6000.c (TARGET_CANNOT_SUBSTITUTE_MEM_EQUIV_P): Define.
(rs6000_cannot_substitute_mem_equiv_p): New function.
gcc/testsuite/
PR rtl-optimization/93974
* g++.dg/pr93974.C: New test.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 4defc1a..a2992e6 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -1734,6 +1734,10 @@ static const struct attribute_spec rs6000_attribute_table[] = #undef TARGET_MANGLE_DECL_ASSEMBLER_NAME #define TARGET_MANGLE_DECL_ASSEMBLER_NAME rs6000_mangle_decl_assembler_name + +#undef TARGET_CANNOT_SUBSTITUTE_MEM_EQUIV_P +#define TARGET_CANNOT_SUBSTITUTE_MEM_EQUIV_P \ + rs6000_cannot_substitute_mem_equiv_p /* Processor table. */ @@ -26375,6 +26379,22 @@ rs6000_predict_doloop_p (struct loop *loop) return true; } +/* Implement TARGET_CANNOT_SUBSTITUTE_MEM_EQUIV_P. */ + +static bool +rs6000_cannot_substitute_mem_equiv_p (rtx mem) +{ + gcc_assert (MEM_P (mem)); + + /* curr_insn_transform()'s handling of subregs cannot handle altivec AND: + type addresses, so don't allow MEMs with those address types to be + substituted as an equivalent expression. See PR93974 for details. */ + if (GET_CODE (XEXP (mem, 0)) == AND) + return true; + + return false; +} + struct gcc_target targetm = TARGET_INITIALIZER; #include "gt-rs6000.h" |