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Reuse LLVM global constants. (#5273)

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Reuse LLVM global constants: do not generate a new llvm::Global constant
for a pointer to a global constant for the same Carbon const_inst_id,
reuse already generated one.
This commit is contained in:
Alina Sbirlea
2025-04-09 16:36:42 +00:00
committed by GitHub
parent 20444c0103
commit 694a329bdd
3 changed files with 10 additions and 10 deletions
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toolchain/lower/testdata/class/virtual.carbon
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+2 -4
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@@ -110,8 +110,6 @@ fn Use() {
// CHECK:STDOUT: @"_CIntermediate.Classes.$vtable" = external unnamed_addr constant ptr
// CHECK:STDOUT: @"_CDerived.Classes.$vtable" = external unnamed_addr constant ptr
// CHECK:STDOUT: @Base.val.loc7_3.2 = internal constant {} zeroinitializer
// CHECK:STDOUT: @Base.val.loc8_44.6 = internal constant {} zeroinitializer
// CHECK:STDOUT: @Base.val.loc9_48.6 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: define void @_CCreate.Create() !dbg !4 {
// CHECK:STDOUT: entry:
@@ -125,13 +123,13 @@ fn Use() {
// CHECK:STDOUT: %.loc8_44.2.vptr = getelementptr inbounds nuw { ptr, {} }, ptr %i.var, i32 0, i32 0, !dbg !8
// CHECK:STDOUT: store ptr @"_CIntermediate.Classes.$vtable", ptr %.loc8_44.2.vptr, align 8, !dbg !8
// CHECK:STDOUT: %.loc8_44.5.base = getelementptr inbounds nuw { ptr, {} }, ptr %i.var, i32 0, i32 1, !dbg !8
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %.loc8_44.5.base, ptr align 1 @Base.val.loc8_44.6, i64 0, i1 false), !dbg !8
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %.loc8_44.5.base, ptr align 1 @Base.val.loc7_3.2, i64 0, i1 false), !dbg !8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 8, ptr %d.var), !dbg !7
// CHECK:STDOUT: %.loc9_49.2.base = getelementptr inbounds nuw { { ptr, {} } }, ptr %d.var, i32 0, i32 0, !dbg !9
// CHECK:STDOUT: %.loc9_48.2.vptr = getelementptr inbounds nuw { ptr, {} }, ptr %.loc9_49.2.base, i32 0, i32 0, !dbg !10
// CHECK:STDOUT: store ptr @"_CDerived.Classes.$vtable", ptr %.loc9_48.2.vptr, align 8, !dbg !10
// CHECK:STDOUT: %.loc9_48.5.base = getelementptr inbounds nuw { ptr, {} }, ptr %.loc9_49.2.base, i32 0, i32 1, !dbg !10
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %.loc9_48.5.base, ptr align 1 @Base.val.loc9_48.6, i64 0, i1 false), !dbg !10
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %.loc9_48.5.base, ptr align 1 @Base.val.loc7_3.2, i64 0, i1 false), !dbg !10
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 8, ptr %d2.var), !dbg !7
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }