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authorbors <bors@rust-lang.org>2024-04-24 03:00:44 +0000
committerbors <bors@rust-lang.org>2024-04-24 03:00:44 +0000
commit29a56a3b1c06a624c0c06728c0af756d09df6b1b (patch)
treef036c0337c315ecfcc2dc452ee2335eb8b2e9f45 /compiler/rustc_codegen_llvm/src/abi.rs
parentc1feb3eceef7d5f0126c309a87062cf413fe0a25 (diff)
parent6df27ef88f2ce082c8f3b9db134bfa3c0c28cf38 (diff)
downloadrust-29a56a3b1c06a624c0c06728c0af756d09df6b1b.tar.gz
rust-29a56a3b1c06a624c0c06728c0af756d09df6b1b.zip
Auto merge of #122053 - erikdesjardins:alloca, r=nikic
Stop using LLVM struct types for alloca

The alloca type has no semantic meaning, only the size (and alignment, but we specify it explicitly) matter. Using `[N x i8]` is a more direct way to specify that we want `N` bytes, and avoids relying on LLVM's struct layout. It is likely that a future LLVM version will change to an untyped alloca representation.

Split out from #121577.

r? `@ghost`
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/abi.rs')
-rw-r--r--compiler/rustc_codegen_llvm/src/abi.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_codegen_llvm/src/abi.rs b/compiler/rustc_codegen_llvm/src/abi.rs
index c0b43b77897..aec11e9905f 100644
--- a/compiler/rustc_codegen_llvm/src/abi.rs
+++ b/compiler/rustc_codegen_llvm/src/abi.rs
@@ -227,7 +227,7 @@ impl<'ll, 'tcx> ArgAbiExt<'ll, 'tcx> for ArgAbi<'tcx, Ty<'tcx>> {
                 //   when passed by value, making it larger.
                 let copy_bytes = cmp::min(scratch_size.bytes(), self.layout.size.bytes());
                 // Allocate some scratch space...
-                let llscratch = bx.alloca(cast.llvm_type(bx), scratch_align);
+                let llscratch = bx.alloca(scratch_size, scratch_align);
                 bx.lifetime_start(llscratch, scratch_size);
                 // ...store the value...
                 bx.store(val, llscratch, scratch_align);