6ac71a0149
This patch introduces a new version for the basic block sections profile as was requested in D158442, while keeping backward compatibility for the old version. The new encoding is as follows: ``` m <module_name> f <function_name_1> <function_name_2>... c <bb_id_1> <bb_id_2> <bb_id_3> c <bb_id_4> <bb_id_5> ... ``` Module name specifier (starting with 'm') is optional and allows distinguishing profiles for internal-linkage functions with the same name. If not specified, profile will be applied to any function with the same name. Function name specifier (starting with 'f') can specify multiple function name aliases. Finally, basic block clusters are specified by 'c' and specify the cluster of basic blocks, and the internal order in which they must be placed in the same section.
93 lines
3.4 KiB
LLVM
93 lines
3.4 KiB
LLVM
; BB cluster section tests.
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;
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; Test1: Basic blocks #0 (entry) and #2 will be placed in the same section.
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; Basic block 1 will be placed in a unique section.
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; The rest will be placed in the cold section.
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;;
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;; Profile for version 0:
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; RUN: echo '!foo' > %t1
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; RUN: echo '!!0 2' >> %t1
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; RUN: echo '!!1' >> %t1
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;;
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;; Profile for version 1:
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; RUN: echo 'v1' > %t2
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; RUN: echo 'f foo' >> %t2
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; RUN: echo 'c 0 2' >> %t2
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; RUN: echo 'c 1' >> %t2
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;
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t1 | FileCheck %s -check-prefix=LINUX-SECTIONS1
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t2 | FileCheck %s -check-prefix=LINUX-SECTIONS1
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;
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; Test2: Basic blocks #1 and #3 will be placed in the same section.
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; All other BBs (including the entry block) go into the function's section.
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; RUN: echo '!foo' > %t3
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; RUN: echo '!!1 3' >> %t3
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; RUN: echo 'v1' > %t4
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; RUN: echo 'f foo' >> %t4
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; RUN: echo 'c 1 3' >> %t4
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t3 | FileCheck %s -check-prefix=LINUX-SECTIONS2
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t4 | FileCheck %s -check-prefix=LINUX-SECTIONS2
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define void @foo(i1 zeroext) nounwind {
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%2 = alloca i8, align 1
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%3 = zext i1 %0 to i8
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store i8 %3, ptr %2, align 1
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%4 = load i8, ptr %2, align 1
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%5 = trunc i8 %4 to i1
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br i1 %5, label %6, label %8
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6: ; preds = %1
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%7 = call i32 @bar()
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br label %10
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8: ; preds = %1
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%9 = call i32 @baz()
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br label %10
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10: ; preds = %8, %6
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ret void
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}
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declare i32 @bar() #1
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declare i32 @baz() #1
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; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-LABEL: foo:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS1-LABEL: # %bb.2:
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; LINUX-SECTIONS1-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits,unique,1
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; LINUX-SECTIONS1-LABEL: foo.__part.1:
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; LINUX-SECTIONS1-LABEL: .LBB_END0_1:
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; LINUX-SECTIONS1-NEXT: .size foo.__part.1, .LBB_END0_1-foo.__part.1
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1: .section .text.split.foo,"ax",@progbits
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; LINUX-SECTIONS1-LABEL: foo.cold:
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; LINUX-SECTIONS1-LABEL: .LBB_END0_3:
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; LINUX-SECTIONS1-NEXT: .size foo.cold, .LBB_END0_3-foo.cold
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; LINUX-SECTIONS1: .section .text.foo,"ax",@progbits
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; LINUX-SECTIONS1-LABEL: .Lfunc_end0:
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; LINUX-SECTIONS1-NEXT: .size foo, .Lfunc_end0-foo
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; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: foo:
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; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: # %bb.2:
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; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits,unique,1
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; LINUX-SECTIONS2-NEXT: foo.__part.0:
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; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_3:
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; LINUX-SECTIONS2-LABEL: .LBB_END0_3:
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; LINUX-SECTIONS2-NEXT: .size foo.__part.0, .LBB_END0_3-foo.__part.0
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; LINUX-SECTIONS2: .section .text.foo,"ax",@progbits
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; LINUX-SECTIONS2-NOT: .LBB_END0_{{0-9}}+
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; LINUX-SECTIONS2-LABEL: .Lfunc_end0:
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; LINUX-SECTIONS2-NEXT: .size foo, .Lfunc_end0-foo
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