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R600/SI: Also enable WQM for image opcodes which calculate LOD v3

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If whole quad mode isn't enabled for these, the level of detail is
calculated incorrectly for pixels along diagonal triangle edges, causing
artifacts.

v2: Use a TSFlag instead of lots of switch cases
v3: Add test coverage

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88642
Reviewed-by: Tom Stellard <tom@stellard.net>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228372 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michel Danzer
2015-02-06 02:51:20 +00:00
parent ab28439f9a
commit a7879dcf33
8 changed files with 119 additions and 56 deletions
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2
lib/Target/R600/SILowerControlFlow.cpp
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@@ -447,7 +447,7 @@ bool SILowerControlFlowPass::runOnMachineFunction(MachineFunction &MF) {
Next = std::next(I);
MachineInstr &MI = *I;
if (TII->isDS(MI.getOpcode()))
if (TII->isWQM(MI.getOpcode()) || TII->isDS(MI.getOpcode()))
NeedWQM = true;
// Flat uses m0 in case it needs to access LDS.