[PATCH] D49842: AMDGPU: Fix code size for return_to_epilog pseudo
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 26 03:24:17 PDT 2018
arsenm created this revision.
arsenm added a reviewer: rampitec.
Herald added subscribers: t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, kzhuravl.
https://reviews.llvm.org/D49842
Files:
lib/Target/AMDGPU/SIInstrInfo.cpp
lib/Target/AMDGPU/SIInstructions.td
test/CodeGen/AMDGPU/ret.ll
Index: test/CodeGen/AMDGPU/ret.ll
===================================================================
--- test/CodeGen/AMDGPU/ret.ll
+++ test/CodeGen/AMDGPU/ret.ll
@@ -241,6 +241,12 @@
ret { { float, i32 }, { i32, <2 x float> } } { { float, i32 } { float 1.000000e+00, i32 2 }, { i32, <2 x float> } { i32 3, <2 x float> <float 2.000000e+00, float 4.000000e+00> } }
}
+; GCN-LABEL: {{^}}ret_return_to_epilog_pseudo_size:
+; GCN: codeLenInByte = 0{{$}}
+define amdgpu_ps float @ret_return_to_epilog_pseudo_size() #0 {
+ ret float undef
+}
+
declare void @llvm.amdgcn.exp.f32(i32, i32, float, float, float, float, i1, i1) #0
attributes #0 = { nounwind }
Index: lib/Target/AMDGPU/SIInstructions.td
===================================================================
--- lib/Target/AMDGPU/SIInstructions.td
+++ lib/Target/AMDGPU/SIInstructions.td
@@ -374,6 +374,7 @@
let isReturn = 1;
let hasNoSchedulingInfo = 1;
let DisableWQM = 1;
+ let FixedSize = 1;
}
// Return for returning function calls.
Index: lib/Target/AMDGPU/SIInstrInfo.cpp
===================================================================
--- lib/Target/AMDGPU/SIInstrInfo.cpp
+++ lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -4753,12 +4753,12 @@
if (DescSize != 0 && DescSize != 4)
return DescSize;
+ if (isFixedSize(MI))
+ return DescSize;
+
// 4-byte instructions may have a 32-bit literal encoded after them. Check
// operands that coud ever be literals.
if (isVALU(MI) || isSALU(MI)) {
- if (isFixedSize(MI))
- return DescSize;
-
int Src0Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::src0);
if (Src0Idx == -1)
return 4; // No operands.
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