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Change alignment of alloca to a larger one if OdinLLVMBuildTransmute requires it

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gingerBill
2021-03-29 14:31:26 +01:00
parent 48767301a4
commit c1e125a009
1 changed files with 12 additions and 0 deletions
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src/llvm_backend.cpp
+12
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@@ -2865,6 +2865,18 @@ LLVMValueRef OdinLLVMBuildTransmute(lbProcedure *p, LLVMValueRef val, LLVMTypeRe
} }
general_end:; general_end:;
// make the alignment big if necessary
if (LLVMIsALoadInst(val) && src_align < dst_align) {
LLVMValueRef val_ptr = LLVMGetOperand(val, 0);
if (LLVMGetInstructionOpcode(val_ptr) == LLVMAlloca) {
src_align = gb_max(LLVMGetAlignment(val_ptr), dst_align);
LLVMSetAlignment(val_ptr, cast(unsigned)src_align);
}
}
src_size = align_formula(src_size, src_align);
dst_size = align_formula(dst_size, dst_align);
if (LLVMIsALoadInst(val) && (src_size >= dst_size && src_align >= dst_align)) { if (LLVMIsALoadInst(val) && (src_size >= dst_size && src_align >= dst_align)) {
LLVMValueRef val_ptr = LLVMGetOperand(val, 0); LLVMValueRef val_ptr = LLVMGetOperand(val, 0);
val_ptr = LLVMBuildPointerCast(p->builder, val_ptr, LLVMPointerType(dst_type, 0), ""); val_ptr = LLVMBuildPointerCast(p->builder, val_ptr, LLVMPointerType(dst_type, 0), "");