[llvm-branch-commits] [llvm-branch] r195999 - Merging r195879:

[Bill Wendling]

Author: void
Date: Sat Nov 30 21:14:50 2013
New Revision: 195999

URL: http://llvm.org/viewvc/llvm-project?rev=195999&view=rev
Log:
Merging r195879:
------------------------------------------------------------------------
r195879 | tstellar | 2013-11-27 13:23:29 -0800 (Wed, 27 Nov 2013) | 6 lines

R600/SI: Use SGPR_32 register class for 32-bit SMRD outputs

Writing to the M0 register from an SMRD instruction hangs the GPU, so
we need to use the SGPR_32 register class, which does not include M0.

NOTE: This is a candidate for the 3.4 branch.
------------------------------------------------------------------------

Added:
    llvm/branches/release_34/test/CodeGen/R600/si-sgpr-spill.ll
      - copied unchanged from r195879, llvm/trunk/test/CodeGen/R600/si-sgpr-spill.ll
Modified:
    llvm/branches/release_34/   (props changed)
    llvm/branches/release_34/lib/Target/R600/SIInstructions.td

Propchange: llvm/branches/release_34/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Sat Nov 30 21:14:50 2013
@@ -1,3 +1,3 @@
 /llvm/branches/Apple/Pertwee:110850,110961
 /llvm/branches/type-system-rewrite:133420-134817
-/llvm/trunk:155241,195092-195094,195100,195102-195103,195118,195129,195136,195138,195148,195152,195156-195157,195161-195162,195193,195272,195317-195318,195327,195330,195333,195339,195343,195355,195364,195379,195397-195399,195408,195421,195423-195424,195432,195439,195444,195455-195456,195469,195476-195477,195479,195491-195493,195514,195528,195547,195567,195573-195576,195591,195599,195632,195635-195636,195670,195679,195682,195684,195713,195716,195769,195773,195779,195782,195787-195788,195791,195798,195803,195812,195827,195834,195843,195878,195887
+/llvm/trunk:155241,195092-195094,195100,195102-195103,195118,195129,195136,195138,195148,195152,195156-195157,195161-195162,195193,195272,195317-195318,195327,195330,195333,195339,195343,195355,195364,195379,195397-195399,195408,195421,195423-195424,195432,195439,195444,195455-195456,195469,195476-195477,195479,195491-195493,195514,195528,195547,195567,195573-195576,195591,195599,195632,195635-195636,195670,195679,195682,195684,195713,195716,195769,195773,195779,195782,195787-195788,195791,195798,195803,195812,195827,195834,195843,195878-195880,195887

Modified: llvm/branches/release_34/lib/Target/R600/SIInstructions.td
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/release_34/lib/Target/R600/SIInstructions.td?rev=195999&r1=195998&r2=195999&view=diff
==============================================================================
--- llvm/branches/release_34/lib/Target/R600/SIInstructions.td (original)
+++ llvm/branches/release_34/lib/Target/R600/SIInstructions.td Sat Nov 30 21:14:50 2013
@@ -489,14 +489,17 @@ def TBUFFER_STORE_FORMAT_XYZW : MTBUF_St
 
 let mayLoad = 1 in {
 
-defm S_LOAD_DWORD : SMRD_Helper <0x00, "S_LOAD_DWORD", SReg_64, SReg_32>;
+// We are using the SGPR_32 and not the SReg_32 register class for 32-bit
+// SMRD instructions, because the SGPR_32 register class does not include M0
+// and writing to M0 from an SMRD instruction will hang the GPU.
+defm S_LOAD_DWORD : SMRD_Helper <0x00, "S_LOAD_DWORD", SReg_64, SGPR_32>;
 defm S_LOAD_DWORDX2 : SMRD_Helper <0x01, "S_LOAD_DWORDX2", SReg_64, SReg_64>;
 defm S_LOAD_DWORDX4 : SMRD_Helper <0x02, "S_LOAD_DWORDX4", SReg_64, SReg_128>;
 defm S_LOAD_DWORDX8 : SMRD_Helper <0x03, "S_LOAD_DWORDX8", SReg_64, SReg_256>;
 defm S_LOAD_DWORDX16 : SMRD_Helper <0x04, "S_LOAD_DWORDX16", SReg_64, SReg_512>;
 
 defm S_BUFFER_LOAD_DWORD : SMRD_Helper <
-  0x08, "S_BUFFER_LOAD_DWORD", SReg_128, SReg_32
+  0x08, "S_BUFFER_LOAD_DWORD", SReg_128, SGPR_32
 >;
 
 defm S_BUFFER_LOAD_DWORDX2 : SMRD_Helper <