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Merge remote-tracking branch 'origin/master' into llvm12

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Syncing with master branch because I want to re-run
update_clang_options.zig in the llvm12 branch.
This commit is contained in:
Andrew Kelley
2021-03-04 18:23:11 -07:00
parent 0c06a1885f 041212a41c
commit bccef44196
52 changed files with 2351 additions and 376 deletions
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10
src/stage1/codegen.cpp
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@@ -4126,7 +4126,15 @@ static LLVMValueRef gen_frame_size(CodeGen *g, LLVMValueRef fn_val) {
LLVMValueRef casted_fn_val = LLVMBuildBitCast(g->builder, fn_val, ptr_usize_llvm_type, "");
LLVMValueRef negative_one = LLVMConstInt(LLVMInt32Type(), -1, true);
LLVMValueRef prefix_ptr = LLVMBuildInBoundsGEP(g->builder, casted_fn_val, &negative_one, 1, "");
return LLVMBuildLoad(g->builder, prefix_ptr, "");
LLVMValueRef load_inst = LLVMBuildLoad(g->builder, prefix_ptr, "");
// Some architectures (e.g SPARCv9) has different alignment requirements between a
// function/usize pointer and also require all loads to be aligned.
// On those architectures, not explicitly setting the alignment will lead into @frameSize
// generating usize-aligned load instruction that could crash if the function pointer
// happens to be not usize-aligned.
LLVMSetAlignment(load_inst, 1);
return load_inst;
}
static void gen_init_stack_trace(CodeGen *g, LLVMValueRef trace_field_ptr, LLVMValueRef addrs_field_ptr) {