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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-09-27 15:14:04 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-09-27 15:14:04 +0000 |
| commit | 8dac19c0708c9bd0da0b832014918e00ded44d86 (patch) | |
| tree | 008a633a794b968815a5e6d8112a4aa931e06cc3 /lib/Target/SystemZ/SystemZOperators.td | |
| parent | 4d835f1cbe5d8c5f6cea4040bea9b180927a1c05 (diff) | |
| download | external_llvm-8dac19c0708c9bd0da0b832014918e00ded44d86.zip external_llvm-8dac19c0708c9bd0da0b832014918e00ded44d86.tar.gz external_llvm-8dac19c0708c9bd0da0b832014918e00ded44d86.tar.bz2 | |
[SystemZ] Improve handling of PC-relative addresses
The backend previously folded offsets into PC-relative addresses
whereever possible. That's the right thing to do when the address
can be used directly in a PC-relative memory reference (using things
like LRL). But if we have a register-based memory reference and need
to load the PC-relative address separately, it's better to use an anchor
point that could be shared with other accesses to the same area of the
variable.
Fixes a FIXME.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191524 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZOperators.td')
| -rw-r--r-- | lib/Target/SystemZ/SystemZOperators.td | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZOperators.td b/lib/Target/SystemZ/SystemZOperators.td index c90be8f..31cabaa 100644 --- a/lib/Target/SystemZ/SystemZOperators.td +++ b/lib/Target/SystemZ/SystemZOperators.td @@ -30,6 +30,10 @@ def SDT_ZSelectCCMask : SDTypeProfile<1, 4, def SDT_ZWrapPtr : SDTypeProfile<1, 1, [SDTCisSameAs<0, 1>, SDTCisPtrTy<0>]>; +def SDT_ZWrapOffset : SDTypeProfile<1, 2, + [SDTCisSameAs<0, 1>, + SDTCisSameAs<0, 2>, + SDTCisPtrTy<0>]>; def SDT_ZAdjDynAlloc : SDTypeProfile<1, 0, [SDTCisVT<0, i64>]>; def SDT_ZExtractAccess : SDTypeProfile<1, 1, [SDTCisVT<0, i32>, @@ -97,6 +101,8 @@ def z_sibcall : SDNode<"SystemZISD::SIBCALL", SDT_ZCall, [SDNPHasChain, SDNPOutGlue, SDNPOptInGlue, SDNPVariadic]>; def z_pcrel_wrapper : SDNode<"SystemZISD::PCREL_WRAPPER", SDT_ZWrapPtr, []>; +def z_pcrel_offset : SDNode<"SystemZISD::PCREL_OFFSET", + SDT_ZWrapOffset, []>; def z_icmp : SDNode<"SystemZISD::ICMP", SDT_ZICmp, [SDNPOutGlue]>; def z_fcmp : SDNode<"SystemZISD::FCMP", SDT_ZCmp, [SDNPOutGlue]>; def z_tm : SDNode<"SystemZISD::TM", SDT_ZICmp, [SDNPOutGlue]>; |