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IR: switch expression works with numbers

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This commit is contained in:
Andrew Kelley
2016-11-26 00:25:48 -05:00
parent 0c22358cc1
commit bbf785bc1d
6 changed files with 372 additions and 165 deletions
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32
src/codegen.cpp
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@@ -1638,6 +1638,31 @@ static LLVMValueRef ir_render_ctz(CodeGen *g, IrExecutable *executable, IrInstru
return LLVMBuildCall(g->builder, fn_val, params, 2, "");
}
static LLVMValueRef ir_render_switch_br(CodeGen *g, IrExecutable *executable, IrInstructionSwitchBr *instruction) {
assert(!instruction->is_inline);
LLVMValueRef target_value = ir_llvm_value(g, instruction->target_value);
LLVMBasicBlockRef else_block = instruction->else_block->llvm_block;
LLVMValueRef switch_instr = LLVMBuildSwitch(g->builder, target_value, else_block, instruction->case_count);
for (size_t i = 0; i < instruction->case_count; i += 1) {
IrInstructionSwitchBrCase *this_case = &instruction->cases[i];
LLVMAddCase(switch_instr, ir_llvm_value(g, this_case->value), this_case->block->llvm_block);
}
return nullptr;
}
static LLVMValueRef ir_render_phi(CodeGen *g, IrExecutable *executable, IrInstructionPhi *instruction) {
LLVMValueRef phi = LLVMBuildPhi(g->builder, instruction->base.type_entry->type_ref, "");
LLVMValueRef *incoming_values = allocate<LLVMValueRef>(instruction->incoming_count);
LLVMBasicBlockRef *incoming_blocks = allocate<LLVMBasicBlockRef>(instruction->incoming_count);
for (size_t i = 0; i < instruction->incoming_count; i += 1) {
incoming_values[i] = ir_llvm_value(g, instruction->incoming_values[i]);
incoming_blocks[i] = instruction->incoming_blocks[i]->llvm_block;
}
LLVMAddIncoming(phi, incoming_values, incoming_blocks, instruction->incoming_count);
return phi;
}
static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable, IrInstruction *instruction) {
set_debug_source_node(g, instruction->source_node);
@@ -1655,6 +1680,7 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
case IrInstructionIdSliceType:
case IrInstructionIdCompileVar:
case IrInstructionIdSizeOf:
case IrInstructionIdSwitchTarget:
zig_unreachable();
case IrInstructionIdReturn:
return ir_render_return(g, executable, (IrInstructionReturn *)instruction);
@@ -1695,12 +1721,14 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
case IrInstructionIdCtz:
return ir_render_ctz(g, executable, (IrInstructionCtz *)instruction);
case IrInstructionIdSwitchBr:
case IrInstructionIdSwitchTarget:
case IrInstructionIdSwitchVar:
return ir_render_switch_br(g, executable, (IrInstructionSwitchBr *)instruction);
case IrInstructionIdPhi:
return ir_render_phi(g, executable, (IrInstructionPhi *)instruction);
case IrInstructionIdSwitchVar:
case IrInstructionIdContainerInitList:
case IrInstructionIdContainerInitFields:
case IrInstructionIdReadField:
case IrInstructionIdEnumTag:
zig_panic("TODO render more IR instructions to LLVM");
}
zig_unreachable();