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;; Test cloning a single path with -basic-block-sections.
declare void @effect(i32 zeroext)
;; Test a valid application of path cloning.
; RUN: echo 'v1' > %t
; RUN: echo 'f foo' >> %t
; RUN: echo 'p 0 3 5' >> %t
; RUN: echo 'c 0 3.1 5.1 1 2 3 4 5' >> %t
; RUN: llc < %s -mtriple=x86_64-pc-linux -O0 -function-sections -basic-block-sections=%t | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-pc-linux -O0 -function-sections -basic-block-sections=%t -stop-after=bb-path-cloning | FileCheck %s --check-prefix=MIR
define void @foo(i1 %a, i1 %b, i1 %c, i1 %d) {
b0:
call void @effect(i32 0)
br i1 %a, label %b1, label %b3
b1: ; preds = %b0
call void @effect(i32 1)
br i1 %b, label %b2, label %b3
b2: ; preds = %b1
call void @effect(i32 2)
br label %b3
b3: ; preds = %b0, %b1, %b2
call void @effect(i32 3)
br i1 %c, label %b4, label %b5
b4: ; preds = %b3
call void @effect(i32 4)
br i1 %d, label %b5, label %cold
b5: ; preds = %b3, %b4
call void @effect(i32 5)
ret void
cold:
call void @effect(i32 6) ; preds = %b4
ret void
}
;; Check the cloned block ids in MIR.
; MIR: bb.7.b3 (bb_id 3 1):
; MIR: bb.8.b5 (bb_id 5 1):
;; Check the final layout and branches.
;; bb section:
; CHECK: .section .text.foo,"ax",@progbits
; CHECK: foo:
; CHECK: # %bb.0: # %b0
; CHECK: jne .LBB0_1
; CHECK-NEXT: # %bb.7: # %b3
; CHECK: jne .LBB0_4
; CHECK-NEXT: # %bb.8: # %b5
; CHECK: retq
; CHECK-NEXT: .LBB0_1: # %b1
; CHECK: je .LBB0_3
; CHECK-NEXT: # %bb.2: # %b2
; CHECK: callq effect@PLT
; CHECK-NEXT: .LBB0_3: # %b3
; CHECK: je .LBB0_5
; CHECK-NEXT: .LBB0_4: # %b4
; CHECK: je foo.cold
; CHECK-NEXT: .LBB0_5: # %b5
; CHECK: retq
;; split section
; CHECK: .section .text.split.foo,"ax",@progbits
; CHECK: foo.cold: # %cold
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