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