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110 lines
2.4 KiB
110 lines
2.4 KiB
4 months ago
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# RUN: llc -o - %s -mtriple=x86_64-- -run-pass=branch-folder | FileCheck %s
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# Branch folder should ignore the DBG_VALUE between block bb.2 and bb.3,
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# set these blocks as bb.3, so that bb.6 will succeed to merge between bb.2 and bb.3.
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# if the DBG_VALUE is not ignored, bb.6 will merge between bb.1 and bb.2, the result is
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# different with Codegen without -g.
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#
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# Generated with
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#
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# clang++ -g -w -O1 -S -emit-llvm test.cc
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# llc -stop-before=branch-folder test.ll
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#
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# template <typename, typename = int> class e;
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# class allocator {
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# public:
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# ~allocator();
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# };
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# template <typename, typename> class e {
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# public:
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# e(char *, allocator = allocator());
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# };
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# template <typename b, typename c, typename d> bool operator==(e<c, d>, b);
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# class f {
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# public:
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# f(int *, int *, int *, int, int, int, int);
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# e<char> g();
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# void j();
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# };
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# int h, i;
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# class k {
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# void l();
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# bool m_fn4();
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# int m;
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# int n;
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# int q;
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# int fmap;
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# };
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# void k::l() {
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# e<char> o = "";
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# for (;;) {
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# int p = 0;
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# for (;;) {
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# if (m_fn4())
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# break;
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# f a(&q, &fmap, &m, n, h, i, 0);
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# if (a.g() == "")
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# a.j();
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# }
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# }
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# }
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--- |
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define dso_local void @l() {
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ret void
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}
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...
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---
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name: l
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body: |
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bb.0:
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; CHECK: bb.0:
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; CHECK-NEXT: successors: %bb.1({{.*}}), %bb.7
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successors: %bb.1, %bb.3
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bb.1:
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$rdi = MOV64rr $rsp
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bb.2:
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; CHECK: bb.2:
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; CHECK-NEXT: successors: %bb.3
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successors: %bb.2, %bb.4
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DBG_VALUE
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CFI_INSTRUCTION def_cfa_offset 8
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; CHECK: bb.3
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; CHECK-NEXT: successors: %bb.2({{.*}}), %bb.4
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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JMP_1 %bb.4
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bb.3 (landing-pad):
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; CHECK: bb.4:
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; CHECK-NEXT: successors: %bb.5({{.*}}), %bb.6
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successors:
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bb.4:
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successors: %bb.5, %bb.6
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JCC_1 %bb.6, 4, implicit killed $eflags
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; CHECK: JCC_1 %bb.6, 4, implicit $eflags
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JMP_1 %bb.5
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bb.5:
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; CHECK: bb.5:
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; CHECK-NEXT: successors: %bb.6
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$rdi = COPY renamable $r12
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bb.6:
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; CHECK: bb.6:
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; CHECK-NEXT: successors: %bb.3
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successors: %bb.2, %bb.4
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; CHECK: JMP_1 %bb.3
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; CHECK: bb.7 (landing-pad):
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$rdi = COPY renamable $rbx
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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JMP_1 %bb.4
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...
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