AMDGPU: Set hasSideEffects 0 on _term instructions

These were defaulting to true, but they are just wrappers around bit
operations. This avoids regressions in the exec mask optimization
passes in a future commit.

llvm-svn: 356952

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/SIInstructions.td b/llvm/lib/Target/AMDGPU/SIInstructions.td
index 869deb93679..b0ab7032d97 100644
--- a/llvm/lib/Target/AMDGPU/SIInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SIInstructions.td
@@ -172,12 +172,14 @@ def S_MOV_B64_term : SPseudoInstSI<(outs SReg_64:$dst),
    (ins SSrc_b64:$src0)> {
   let isAsCheapAsAMove = 1;
   let isTerminator = 1;
+  let hasSideEffects = 0;
 }
 
 def S_XOR_B64_term : SPseudoInstSI<(outs SReg_64:$dst),
    (ins SSrc_b64:$src0, SSrc_b64:$src1)> {
   let isAsCheapAsAMove = 1;
   let isTerminator = 1;
+  let hasSideEffects = 0;
   let Defs = [SCC];
 }
 
@@ -185,6 +187,7 @@ def S_ANDN2_B64_term : SPseudoInstSI<(outs SReg_64:$dst),
    (ins SSrc_b64:$src0, SSrc_b64:$src1)> {
   let isAsCheapAsAMove = 1;
   let isTerminator = 1;
+  let hasSideEffects = 0;
 }
 
 def WAVE_BARRIER : SPseudoInstSI<(outs), (ins),