basic-block-sections-clusters.ll
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; BB cluster section tests.
;
; Test1: Basic blocks #0 (entry) and #2 will be placed in the same section.
; Basic block 1 will be placed in a unique section.
; The rest will be placed in the cold section.
; RUN: echo '!foo' > %t1
; RUN: echo '!!0 2' >> %t1
; RUN: echo '!!1' >> %t1
; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t1 | FileCheck %s -check-prefix=LINUX-SECTIONS1
;
; Test2: Basic blocks #1 and #3 will be placed in the same section.
; All other BBs (including the entry block) go into the function's section.
; RUN: echo '!foo' > %t2
; RUN: echo '!!1 3' >> %t2
; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t2 | FileCheck %s -check-prefix=LINUX-SECTIONS2
define void @foo(i1 zeroext) nounwind {
%2 = alloca i8, align 1
%3 = zext i1 %0 to i8
store i8 %3, i8* %2, align 1
%4 = load i8, i8* %2, align 1
%5 = trunc i8 %4 to i1
br i1 %5, label %6, label %8
6: ; preds = %1
%7 = call i32 @bar()
br label %10
8: ; preds = %1
%9 = call i32 @baz()
br label %10
10: ; preds = %8, %6
ret void
}
declare i32 @bar() #1
declare i32 @baz() #1
; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits
; LINUX-SECTIONS1-NOT: .section
; LINUX-SECTIONS1-LABEL: foo:
; LINUX-SECTIONS1-NOT: .section
; LINUX-SECTIONS1-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS1-LABEL: # %bb.2:
; LINUX-SECTIONS1-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits,unique,1
; LINUX-SECTIONS1-LABEL: foo.1:
; LINUX-SECTIONS1-LABEL: .LBB_END0_1:
; LINUX-SECTIONS1-NEXT: .size foo.1, .LBB_END0_1-foo.1
; LINUX-SECTIONS1-NOT: .section
; LINUX-SECTIONS1: .section .text.unlikely.foo,"ax",@progbits
; LINUX-SECTIONS1-LABEL: foo.cold:
; LINUX-SECTIONS1-LABEL: .LBB_END0_3:
; LINUX-SECTIONS1-NEXT: .size foo.cold, .LBB_END0_3-foo.cold
; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits
; LINUX-SECTIONS1-LABEL: .Lfunc_end0:
; LINUX-SECTIONS1-NEXT: .size foo, .Lfunc_end0-foo
; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits
; LINUX-SECTIONS2-NOT: .section
; LINUX-SECTIONS2-LABEL: foo:
; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS2-NOT: .section
; LINUX-SECTIONS2-LABEL: # %bb.2:
; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits,unique,1
; LINUX-SECTIONS2-NEXT: foo.0:
; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS2-NOT: .section
; LINUX-SECTIONS2-LABEL: .LBB0_3:
; LINUX-SECTIONS2-LABEL: .LBB_END0_3:
; LINUX-SECTIONS2-NEXT: .size foo.0, .LBB_END0_3-foo.0
; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits
; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
; LINUX-SECTIONS2-LABEL: .Lfunc_end0:
; LINUX-SECTIONS2-NEXT: .size foo, .Lfunc_end0-foo