b19194c032
Remove the known limitation of the library function call folders to only work with top-level arrays of characters (as per the TODO comment in the code) and allows them to also fold calls involving subobjects of constant aggregates such as member arrays.
53 lines
1.5 KiB
LLVM
53 lines
1.5 KiB
LLVM
; RUN: llc < %s -march=bpfel | FileCheck -check-prefixes=CHECK %s
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; Source code:
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; struct test_t {
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; int a;
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; char b;
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; int c;
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; char d;
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; };
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; void foo(void *);
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; void test() {
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; struct test_t t = {.a = 5};
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; foo(&t);
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; }
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%struct.test_t = type { i32, i8, i32, i8 }
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@test.t = private unnamed_addr constant %struct.test_t { i32 5, i8 0, i32 0, i8 0 }, align 4
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; Function Attrs: nounwind
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define dso_local void @test() local_unnamed_addr #0 {
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; CHECK-LABEL: test:
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%1 = alloca %struct.test_t, align 4
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%2 = bitcast %struct.test_t* %1 to i8*
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call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %2) #3
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 %2, i8* align 4 bitcast (%struct.test_t* @test.t to i8*), i64 16, i1 false)
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; CHECK: r1 = 0
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; CHECK: *(u64 *)(r10 - 8) = r1
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; CHECK: r1 = 5
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; CHECK: *(u64 *)(r10 - 16) = r1
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; CHECK: r1 = r10
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; CHECK: r1 += -16
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call void @foo(i8* nonnull %2) #3
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; CHECK: call foo
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call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %2) #3
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ret void
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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; Function Attrs: argmemonly nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1
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declare dso_local void @foo(i8*) local_unnamed_addr
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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attributes #0 = { nounwind }
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attributes #1 = { argmemonly nounwind }
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attributes #3 = { nounwind }
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