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stage2: LLVM backend: adjust replaceAllUsesWith usage

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replaceAllUsesWith requires the type to be unchanged. So we bitcast
the new global to the old type and use that as the thing to replace
old uses.

Fixes an LLVM assertion found while troubleshooting #10837.
This commit is contained in:
Andrew Kelley 2022-02-10 15:42:57 -07:00 committed by Jakub Konka
parent beb275b371
commit f293fbbeaf
1 changed files with 5 additions and 1 deletions
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src/codegen/llvm.zig
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@ -661,7 +661,11 @@ pub const DeclGen = struct {
new_global.setUnnamedAddr(global.getUnnamedAddress());
new_global.setAlignment(global.getAlignment());
new_global.setInitializer(llvm_init);
global.replaceAllUsesWith(new_global);
// replaceAllUsesWith requires the type to be unchanged. So we bitcast
// the new global to the old type and use that as the thing to replace
// old uses.
const new_global_ptr = new_global.constBitCast(global.typeOf());
global.replaceAllUsesWith(new_global_ptr);
dg.object.decl_map.putAssumeCapacity(decl, new_global);
new_global.takeName(global);
global.deleteGlobal();