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| author | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2019-02-27 00:18:28 +0000 |
|---|---|---|
| committer | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2019-02-27 00:18:28 +0000 |
| commit | 129826cd9fb5a86ad1d92eeb1b933a2c82e2721f (patch) | |
| tree | fd6e29cda1aeed7089d33497ec96d2727abc827a /libcxx/test/std/strings/basic.string/string.ops/string_substr/substr.pass.cpp | |
| parent | 427aeb3ad2306bbf32afa1ebfdb8587767b40c00 (diff) | |
| download | bcm5719-llvm-129826cd9fb5a86ad1d92eeb1b933a2c82e2721f.tar.gz bcm5719-llvm-129826cd9fb5a86ad1d92eeb1b933a2c82e2721f.zip | |
[SystemZ] Pass regalloc hints to help Load-and-Test transformations.
Since there is no "Load-and-Test-High" instruction, the 32 bit load of a
register to be compared with 0 can only be implemented with LT if the virtual
GRX32 register ends up in a low part (GR32 register).
This patch detects these cases and passes the GR32 registers (low parts) as
(soft) hints in getRegAllocationHints().
Review: Ulrich Weigand.
llvm-svn: 354935
Diffstat (limited to 'libcxx/test/std/strings/basic.string/string.ops/string_substr/substr.pass.cpp')
0 files changed, 0 insertions, 0 deletions
