AMDGPU: Implement ReverseBranchCondition
llvm-svn: 270296
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
index 64416e8..7b232ba 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -1166,6 +1166,13 @@
return 2;
}
+bool SIInstrInfo::ReverseBranchCondition(
+ SmallVectorImpl<MachineOperand> &Cond) const {
+ assert(Cond.size() == 1);
+ Cond[0].setImm(-Cond[0].getImm());
+ return false;
+}
+
static void removeModOperands(MachineInstr &MI) {
unsigned Opc = MI.getOpcode();
int Src0ModIdx = AMDGPU::getNamedOperandIdx(Opc,
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.h b/llvm/lib/Target/AMDGPU/SIInstrInfo.h
index 4e37372..46705cd 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.h
@@ -157,6 +157,9 @@
MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
DebugLoc DL) const override;
+ bool ReverseBranchCondition(
+ SmallVectorImpl<MachineOperand> &Cond) const override;
+
bool areMemAccessesTriviallyDisjoint(
MachineInstr *MIa, MachineInstr *MIb,
AliasAnalysis *AA = nullptr) const override;
diff --git a/llvm/test/CodeGen/AMDGPU/uniform-cfg.ll b/llvm/test/CodeGen/AMDGPU/uniform-cfg.ll
index 87a4739..dfc82f8 100644
--- a/llvm/test/CodeGen/AMDGPU/uniform-cfg.ll
+++ b/llvm/test/CodeGen/AMDGPU/uniform-cfg.ll
@@ -168,10 +168,8 @@
; SI-LABEL: {{^}}uniform_if_else_ret:
; SI: s_cmp_lg_i32 s{{[0-9]+}}, 0
-; SI-NEXT: s_cbranch_scc1 [[ELSE_LABEL:[0-9_A-Za-z]+]]
-; SI-NEXT: s_branch [[IF_LABEL:[0-9_A-Za-z]+]]
+; SI-NEXT: s_cbranch_scc0 [[IF_LABEL:[0-9_A-Za-z]+]]
-; SI: [[ELSE_LABEL]]:
; SI: v_mov_b32_e32 [[TWO:v[0-9]+]], 2
; SI: buffer_store_dword [[TWO]]
; SI: s_endpgm
@@ -199,10 +197,8 @@
; SI-LABEL: {{^}}uniform_if_else:
; SI: s_cmp_lg_i32 s{{[0-9]+}}, 0
-; SI-NEXT: s_cbranch_scc1 [[ELSE_LABEL:[0-9_A-Za-z]+]]
-; SI-NEXT: s_branch [[IF_LABEL:[0-9_A-Za-z]+]]
+; SI-NEXT: s_cbranch_scc0 [[IF_LABEL:[0-9_A-Za-z]+]]
-; SI: [[ELSE_LABEL]]:
; SI: v_mov_b32_e32 [[TWO:v[0-9]+]], 2
; SI: buffer_store_dword [[TWO]]
; SI: s_branch [[ENDIF_LABEL:[0-9_A-Za-z]+]]