derek.holloway
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95 lines
2.4 KiB
Plaintext
95 lines
2.4 KiB
Plaintext
## Check that BOLT handles correctly folding functions with --icf=safe that can be referenced by non-control flow instructions,
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## when binary is built with -fno-PIC/-fno-PIE.
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# REQUIRES: system-linux, asserts
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# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-linux %s -o %t1.o
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# RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q -no-pie
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# RUN: llvm-bolt --no-threads %t.exe --icf -debug-only=bolt-icf -o %t.bolt 2>&1 | FileCheck --check-prefix=ICFCHECK %s
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# RUN: llvm-bolt --no-threads %t.exe --icf=safe -debug-only=bolt-icf -o %t.bolt 2>&1 | FileCheck --check-prefix=SAFEICFCHECK %s
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# ICFCHECK: ICF iteration 1
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# ICFCHECK-NEXT: folding barAddFunc into fooAddFunc
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# ICFCHECK-NEXT: folding barMulFunc into fooMulFunc
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# SAFEICFCHECK: skipping function with reference taken fooMulFunc
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# SAFEICFCHECK-NEXT: skipping function with reference taken barMulFunc
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# SAFEICFCHECK-NEXT: skipping function with reference taken barAddFunc
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# SAFEICFCHECK-NEXT: ICF iteration 1
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## clang++ main.cpp -c -o -fno-PIC
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## Similar code gets generated for external reference function.
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## Other functions removed for brevity.
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## const static int (*const funcGlobalBarAdd)(int, int) = barAdd;
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## const int (*const funcGlobalBarMul)(int, int) = barMul;
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## int main(int argc, char **argv) {
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## int temp = helper1(funcGlobalBarAdd, FooVar, BarVar)
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## return temp;
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## }
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## Manually modified to remove "extra" assembly.
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.globl fooMulFunc
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.type fooMulFunc,@function
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fooMulFunc:
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imull -8(%rbp), %eax
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retq
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.size fooMulFunc, .-fooMulFunc
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.globl barMulFunc
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.type barMulFunc,@function
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barMulFunc:
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imull -8(%rbp), %eax
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retq
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.size barMulFunc, .-barMulFunc
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.globl fooAddFunc
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.type fooAddFunc,@function
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fooAddFunc:
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addl -8(%rbp), %eax
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retq
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.size fooAddFunc, .-fooAddFunc
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.globl barAddFunc
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.type barAddFunc,@function
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barAddFunc:
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addl -8(%rbp), %eax
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retq
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.size barAddFunc, .-barAddFunc
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.globl helperFunc
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.type helperFunc,@function
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helperFunc:
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movabsq $barAddFunc, %rax
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cmpq %rax, -16(%rbp)
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retq
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.size helperFunc, .-helperFunc
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.globl main
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.type main,@function
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main:
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movl FooVar, %esi
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movl BarVar, %edx
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movabsq $barAddFunc, %rdi
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callq helperFunc
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movabsq $fooMulFunc, %rdi
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movabsq $barMulFunc, %rsi
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retq
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.size main, .-main
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.type FooVar,@object
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.data
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.globl FooVar
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FooVar:
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.long 1
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.size FooVar, 4
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.type BarVar,@object
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.globl BarVar
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BarVar:
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.long 2
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.size BarVar, 4
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.type .L.str,@object
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.section .rodata.str1.1,"aMS",@progbits,1
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.L.str:
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.asciz "val: %d\n"
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.size .L.str, 9
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