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| author | Tom Stellard <thomas.stellard@amd.com> | 2014-09-22 15:35:32 +0000 |
|---|---|---|
| committer | Tom Stellard <thomas.stellard@amd.com> | 2014-09-22 15:35:32 +0000 |
| commit | c9965f41865abe8a3f781e28a36e37bae9ed791a (patch) | |
| tree | face9a9819f9437a026eb75309116312403d98e3 /llvm/lib | |
| parent | 4349b19efb01eee44354705894ed6777f7488e4b (diff) | |
| download | bcm5719-llvm-c9965f41865abe8a3f781e28a36e37bae9ed791a.tar.gz bcm5719-llvm-c9965f41865abe8a3f781e28a36e37bae9ed791a.zip | |
R600: Don't set BypassSlowDiv for 64-bit division
BypassSlowDiv is used by codegen prepare to insert a run-time
check to see if the operands to a 64-bit division are really 32-bit
values and if they are it will do 32-bit division instead.
This is not useful for R600, which has predicated control flow since
both the 32-bit and 64-bit paths will be executed in most cases. It
also increases code size which can lead to more instruction cache
misses.
llvm-svn: 218252
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/R600/AMDGPUISelLowering.cpp | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp index d3ef77880d4..29d3fc38e57 100644 --- a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp +++ b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp @@ -392,9 +392,6 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) : setIntDivIsCheap(false); setPow2SDivIsCheap(false); - // TODO: Investigate this when 64-bit divides are implemented. - addBypassSlowDiv(64, 32); - // FIXME: Need to really handle these. MaxStoresPerMemcpy = 4096; MaxStoresPerMemmove = 4096; |
