67d3ef74b3
This PR continues https://github.com/llvm/llvm-project/pull/101732 changes in virtual register processing aimed to improve correctness of emitted MIR between passes from the perspective of MachineVerifier. Namely, the following changes are introduced: * register classes (lib/Target/SPIRV/SPIRVRegisterInfo.td) and instruction patterns (lib/Target/SPIRV/SPIRVInstrInfo.td) are corrected and simplified (by removing unnecessary sophisticated options) -- e.g., this PR gets rid of duplicating 32/64 bits patterns, removes ANYID register class and simplifies definition of the rest of register classes, * hardcoded LLT scalar types in passes before instruction selection are corrected -- the goal is to have correct bit width before instruction selection, and use 64 bits registers for pattern matching in the instruction selection pass; 32-bit registers remain where they are described in such terms by SPIR-V specification (like, for example, creation of virtual registers for scope/mem semantics operands), * rework virtual register type/class assignment for calls/builtins lowering, * a series of minor changes to fix validity of emitted code between passes: - ensure that that bitcast changes the type, - fix the pattern for instruction selection for OpExtInst, - simplify inline asm operands usage, - account for arbitrary integer sizes / update legalizer rules; * add '-verify-machineinstrs' to existed test cases. See also https://github.com/llvm/llvm-project/issues/88129 that this PR may resolve. This PR fixes a great number of issues reported by MachineVerifier and, as a result, reduces a number of failed test cases for the mode with expensive checks set on from ~200 to ~57.
16 lines
485 B
LLVM
16 lines
485 B
LLVM
; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
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define spir_func float @Test(float %x, float %y) {
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entry:
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%0 = call float @llvm.maxnum.f32(float %x, float %y)
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ret float %0
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}
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; CHECK: OpFunction
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; CHECK: %[[#x:]] = OpFunctionParameter %[[#]]
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; CHECK: %[[#y:]] = OpFunctionParameter %[[#]]
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; CHECK: %[[#res:]] = OpExtInst %[[#]] %[[#]] fmax %[[#x]] %[[#y]]
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; CHECK: OpReturnValue %[[#res]]
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declare float @llvm.maxnum.f32(float, float)
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