xref: /llvm-project/bolt/test/X86/fallthrough-to-noop.test (revision 11791ae7b0b05b8bd8d806331ff51da618912cf8)
1*11791ae7SSayhaan Siddiqui## Check that profile data for the fall-through jump is not ignored when there is
2*11791ae7SSayhaan Siddiqui## a conditional jump followed by a no-op.
32e0ad6ffSAmir Ayupov
42e0ad6ffSAmir AyupovRUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
52e0ad6ffSAmir AyupovRUN:   %S/Inputs/ft_to_noop.s -o %t.o
6b8a63455SRafael AulerRUN: link_fdata %S/Inputs/ft_to_noop.s %t.o %t.fdata --nmtool llvm-nm
72e0ad6ffSAmir AyupovRUN: llvm-strip --strip-unneeded %t.o
887a57aadSVladislav KhmelevskyRUN: %clang %cflags %t.o -o %t.exe -Wl,-q
9d648aa1bSMaksim PanchenkoRUN: llvm-bolt %t.exe -o %t --data %t.fdata \
10d648aa1bSMaksim PanchenkoRUN:   --print-cfg --sequential-disassembly 2>&1 | FileCheck %s
112e0ad6ffSAmir Ayupov
122e0ad6ffSAmir AyupovCHECK:      Binary Function "foo" after building cfg
132e0ad6ffSAmir AyupovCHECK:        Exec Count  : 20
142e0ad6ffSAmir AyupovCHECK:        Profile Acc : 100.0%
152e0ad6ffSAmir Ayupov
16*11791ae7SSayhaan Siddiqui## This block is terminated with a conditional jump to .Ltmp0 followed by a
17*11791ae7SSayhaan Siddiqui## no-op. The profile data contains a count for the fall-through (3) which
18*11791ae7SSayhaan Siddiqui## is different from what would be inferred (2). However the destination
19*11791ae7SSayhaan Siddiqui## offset of this fall-through jump in the profile data points to the no-op
20*11791ae7SSayhaan Siddiqui## following the jump and not the start of the fall-through block .LFT0.
212e0ad6ffSAmir AyupovCHECK:      Entry Point
222e0ad6ffSAmir AyupovCHECK-NEXT:   Exec Count : 20
232e0ad6ffSAmir AyupovCHECK:        Successors: .Ltmp[[#BB1:]] (mispreds: 0, count: 18), .LFT[[#BB2:]] (mispreds: 0, count: 3)
242e0ad6ffSAmir Ayupov
252e0ad6ffSAmir AyupovCHECK:      .LFT[[#BB2]]
262e0ad6ffSAmir AyupovCHECK-NEXT:   Exec Count : 3
272e0ad6ffSAmir AyupovCHECK:        Successors: .Ltmp[[#]] (mispreds: 0, count: 0)
282e0ad6ffSAmir Ayupov
292e0ad6ffSAmir AyupovCHECK:      .Ltmp[[#BB1]]
302e0ad6ffSAmir AyupovCHECK-NEXT:   Exec Count : 18
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