c8ac29ab1d
Today symbol names generated for machine basic block sections use a unary encoding to reduce bloat. This is essential when every basic block in the binary is assigned a symbol however with basic block clusters (rG05192e585ce175b55f2a26b83b4ed7882785c8e6) when we only need to generate a few non-temporary symbols we can assign more descriptive names making them more user friendly. With this change - Cold cluster section for function foo is named "foo.cold" Exception cluster section for function foo is named "foo.eh" Other cluster sections identified by their ids are named "foo.ID" Using this format works well with existing tools. It will demangle as expected and works with existing symbolizers, profilers and debuggers out of the box. $ c++filt _Z3foov.cold foo() [clone .cold] $ c++filt _Z3foov.eh foo() [clone .eh] $c++filt _Z3foov.1234 foo() [clone 1234] Tests for basicblock-sections are updated with some cleanup where appropriate. Differential Revision: https://reviews.llvm.org/D79221
89 lines
2.9 KiB
LLVM
89 lines
2.9 KiB
LLVM
; BB cluster section test for exception handling.
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;
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; Test1: Basic blocks #1 and #3 are landing pads and must be in the same section.
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; Basic block 2 will be placed in a unique section, but #1 and #3 are placed in the special exception section.
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; The rest will be placed in a section along with the entry basic block.
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; RUN: echo '!main' > %t1
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; RUN: echo '!!1 2' >> %t1
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basicblock-sections=%t1 | FileCheck %s -check-prefix=LINUX-SECTIONS1
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;
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; Test2: Basic blocks #1, #2, and #3 go into a separate section.
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; No separate exception section will be created as #1 and #3 are already in one section.
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; The rest will be placed in a section along with the entry basic block.
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; RUN: echo '!main' > %t2
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; RUN: echo '!!1 2 3' >> %t2
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basicblock-sections=%t2 | FileCheck %s -check-prefix=LINUX-SECTIONS2
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@_ZTIi = external constant i8*
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define i32 @main() uwtable optsize ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @_Z1fv() optsize
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to label %try.cont unwind label %lpad1
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lpad1:
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%0 = landingpad { i8*, i32 }
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cleanup
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catch i8* bitcast (i8** @_ZTIi to i8*)
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br label %eh.resume1
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try.cont:
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invoke void @_Z2fv() optsize
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to label %try.cont unwind label %lpad2
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ret i32 0
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lpad2:
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%2 = landingpad { i8*, i32 }
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cleanup
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catch i8* bitcast (i8** @_ZTIi to i8*)
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br label %eh.resume2
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eh.resume1:
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resume { i8*, i32 } %0
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eh.resume2:
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resume { i8*, i32 } %2
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}
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declare void @_Z1fv() optsize
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declare void @_Z2fv() optsize
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declare i32 @__gxx_personality_v0(...)
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; LINUX-SECTIONS1: .section .text.main,"ax",@progbits
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; LINUX-SECTIONS1-LABEL: main:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-LABEL: .LBB0_4:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-LABEL: .LBB0_5:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-LABEL: .LBB0_6:
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; LINUX-SECTIONS1: .section .text.main,"ax",@progbits,unique,1
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; LINUX-SECTIONS1-LABEL: main.0:
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; LINUX-SECTIONS1: .section .text.eh.main,"ax",@progbits
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; LINUX-SECTIONS1-LABEL: main.eh:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1-LABEL: .LBB0_3:
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; LINUX-SECTIONS1-NOT: .section
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; LINUX-SECTIONS1: .section .text.main,"ax",@progbits
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; LINUX-SECTIONS1-LABEL: .Lfunc_end0
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; LINUX-SECTIONS2: .section .text.main,"ax",@progbits
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; LINUX-SECTIONS2-LABEL: main:
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_4:
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_5:
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_6:
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; LINUX-SECTIONS2: .section .text.main,"ax",@progbits,unique,1
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; LINUX-SECTIONS2-LABEL: main.0:
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_2:
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; LINUX-SECTIONS2-NOT: .section
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; LINUX-SECTIONS2-LABEL: .LBB0_3:
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; LINUX-SECTIONS2: .section .text.main,"ax",@progbits
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; LINUX-SECTIONS2-LABEL: .Lfunc_end0
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