Revert "[AMDGPU] Ensure there are enough registers for wave dispatch"

This reverts 329808. That change caused a report of a failure in
test/CodeGen/MIR/AMDGPU/mir-canon-multi.mir that I didn't see. I suspect
it is an expensive-check-only error.

Change-Id: I8133f26f15e7d5ec2b09c687c12cd70e918461b0
llvm-svn: 329811

1 files changed, 0 insertions, 13 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
index 9cb9045ca76..d64e6555d03 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
@@ -837,19 +837,6 @@ void AMDGPUAsmPrinter::getSIProgramInfo(SIProgramInfo &ProgInfo,
   ProgInfo.NumSGPR += ExtraSGPRs;
   ProgInfo.NumVGPR += ExtraVGPRs;
 
-  // Ensure there are enough SGPRs and VGPRs for wave dispatch, where wave
-  // dispatch registers are function args.
-  unsigned WaveDispatchNumSGPR = 0, WaveDispatchNumVGPR = 0;
-  for (auto &Arg : MF.getFunction().args()) {
-    unsigned NumRegs = (Arg.getType()->getPrimitiveSizeInBits() + 31) / 32;
-    if (Arg.hasAttribute(Attribute::InReg))
-      WaveDispatchNumSGPR += NumRegs;
-    else
-      WaveDispatchNumVGPR += NumRegs;
-  }
-  ProgInfo.NumSGPR = std::max(ProgInfo.NumSGPR, WaveDispatchNumSGPR);
-  ProgInfo.NumVGPR = std::max(ProgInfo.NumVGPR, WaveDispatchNumVGPR);
-
   // Adjust number of registers used to meet default/requested minimum/maximum
   // number of waves per execution unit request.
   ProgInfo.NumSGPRsForWavesPerEU = std::max(