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| author | William Sengir <william@sengir.com> | 2022-03-20 00:00:13 -0700 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2022-03-21 16:54:19 -0700 |
| commit | 4e357151a54c9a2f373cef59e2718a61cfbe3658 (patch) | |
| tree | 9416550e7b7f086bab7648063814dc91e6bacbed /src | |
| parent | 961248cde32e0d572225c6c1d367b960540ae220 (diff) | |
| download | zig-4e357151a54c9a2f373cef59e2718a61cfbe3658.tar.gz zig-4e357151a54c9a2f373cef59e2718a61cfbe3658.zip | |
stage2: align store for vector-to-array bitcast in LLVM backend
This was causing a very rare segfault when LLVM would emit `vmovdqa`
using an unaligned memory operand on the stack.
Diffstat (limited to 'src')
| -rw-r--r-- | src/codegen/llvm.zig | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig index 13f4f7d01b..107b059765 100644 --- a/src/codegen/llvm.zig +++ b/src/codegen/llvm.zig @@ -5563,7 +5563,8 @@ pub const FuncGen = struct { if (bitcast_ok) { const llvm_vector_ty = try self.dg.llvmType(operand_ty); const casted_ptr = self.builder.buildBitCast(array_ptr, llvm_vector_ty.pointerType(0), ""); - _ = self.builder.buildStore(operand, casted_ptr); + const llvm_store = self.builder.buildStore(operand, casted_ptr); + llvm_store.setAlignment(inst_ty.abiAlignment(target)); } else { // If the ABI size of the element type is not evenly divisible by size in bits; // a simple bitcast will not work, and we fall back to extractelement. |