1; BB cluster sections test for optimizing basic block branches. 2; 3; Test1: Basic blocks #0 (entry) and #2 will be placed in the same section. 4; There should be a jne from #0 to #1 and a fallthrough to #2. 5; BB #1 will be in a unique section. Therefore, it should retain its jmp to #3. 6; #2 must also have an explicit jump to #3. 7; RUN: echo '!foo' > %t1 8; RUN: echo '!!0 2' >> %t1 9; RUN: echo '!!1' >> %t1 10; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t1 | FileCheck %s -check-prefix=LINUX-SECTIONS1 11; 12; Test2: Basic blocks #1 and #3 will be placed in the same section. 13; The rest (#0 and #2) go into the function's section. 14; This means #1 must fall through to #3, and #0 must fall through to #2. 15; #2 must have an explicit jump to #3. 16; RUN: echo '!foo' > %t2 17; RUN: echo '!!1 3' >> %t2 18; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t2 | FileCheck %s -check-prefix=LINUX-SECTIONS2 19 20define void @foo(i1 zeroext) nounwind { 21 %2 = alloca i8, align 1 22 %3 = zext i1 %0 to i8 23 store i8 %3, i8* %2, align 1 24 %4 = load i8, i8* %2, align 1 25 %5 = trunc i8 %4 to i1 26 br i1 %5, label %6, label %8 27 286: ; preds = %1 29 %7 = call i32 @bar() 30 br label %10 31 328: ; preds = %1 33 %9 = call i32 @baz() 34 br label %10 35 3610: ; preds = %8, %6 37 ret void 38} 39 40declare i32 @bar() #1 41 42declare i32 @baz() #1 43 44; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits 45; LINUX-SECTIONS1-LABEL: foo: 46; LINUX-SECTIONS1: jne foo.__part.1 47; LINUX-SECTIONS1-NOT: {{jne|je|jmp}} 48; LINUX-SECTIONS1-LABEL: # %bb.2: 49; LINUX-SECTIONS1: jmp foo.cold 50; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits,unique,1 51; LINUX-SECTIONS1-LABEL: foo.__part.1: 52; LINUX-SECTIONS1: jmp foo.cold 53; LINUX-SECTIONS1: .section .text.split.foo,"ax",@progbits 54; LINUX-SECTIONS1-LABEL: foo.cold: 55 56; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits 57; LINUX-SECTIONS2-LABEL: foo: 58; LINUX-SECTIONS2: jne foo.__part.0 59; LINUX-SECTIONS2-NOT: {{jne|je|jmp}} 60; LINUX-SECTIONS2-LABEL: # %bb.2: 61; LINUX-SECTIONS2: jmp .LBB0_3 62; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits,unique,1 63; LINUX-SECTIONS2: foo.__part.0: 64; LINUX-SECTIONS2-NOT: {{jne|je|jmp}} 65; LINUX-SECTIONS2: .LBB0_3: 66