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| author | Jim Grosbach <grosbach@apple.com> | 2010-01-22 00:08:13 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-01-22 00:08:13 +0000 |
| commit | d5d2baec2609da3ade9ca205e87c88d35e9e6976 (patch) | |
| tree | 0250b253e3176ffc8d6f5655b0de22bb09b56270 /lib/Target/ARM/ARMInstrThumb2.td | |
| parent | 8767d32e758db3ffef796342a2650f337cf3404a (diff) | |
| download | external_llvm-d5d2baec2609da3ade9ca205e87c88d35e9e6976.zip external_llvm-d5d2baec2609da3ade9ca205e87c88d35e9e6976.tar.gz external_llvm-d5d2baec2609da3ade9ca205e87c88d35e9e6976.tar.bz2 | |
Fix PR5694. The CMN instructions set the flags differently from CMP, so they
cannot be directly interchanged for comparisons against negated values.
Disable the CMN instructions for the time being.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94119 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMInstrThumb2.td')
| -rw-r--r-- | lib/Target/ARM/ARMInstrThumb2.td | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td index 34a793c..c7591d2 100644 --- a/lib/Target/ARM/ARMInstrThumb2.td +++ b/lib/Target/ARM/ARMInstrThumb2.td @@ -1609,16 +1609,18 @@ defm t2CMP : T2I_cmp_irs<0b1101, "cmp", defm t2CMPz : T2I_cmp_irs<0b1101, "cmp", BinOpFrag<(ARMcmpZ node:$LHS, node:$RHS)>>; -defm t2CMN : T2I_cmp_irs<0b1000, "cmn", - BinOpFrag<(ARMcmp node:$LHS,(ineg node:$RHS))>>; +//FIXME: Disable CMN, as CCodes are backwards from compare expectations +// Compare-to-zero still works out, just not the relationals +//defm t2CMN : T2I_cmp_irs<0b1000, "cmn", +// BinOpFrag<(ARMcmp node:$LHS,(ineg node:$RHS))>>; defm t2CMNz : T2I_cmp_irs<0b1000, "cmn", BinOpFrag<(ARMcmpZ node:$LHS,(ineg node:$RHS))>>; -def : T2Pat<(ARMcmp GPR:$src, t2_so_imm_neg:$imm), - (t2CMNri GPR:$src, t2_so_imm_neg:$imm)>; +//def : T2Pat<(ARMcmp GPR:$src, t2_so_imm_neg:$imm), +// (t2CMNri GPR:$src, t2_so_imm_neg:$imm)>; def : T2Pat<(ARMcmpZ GPR:$src, t2_so_imm_neg:$imm), - (t2CMNri GPR:$src, t2_so_imm_neg:$imm)>; + (t2CMNzri GPR:$src, t2_so_imm_neg:$imm)>; defm t2TST : T2I_cmp_irs<0b0000, "tst", BinOpFrag<(ARMcmpZ (and node:$LHS, node:$RHS), 0)>>; |