diff options
| -rw-r--r-- | lld/test/ELF/linkerscript/Inputs/arm-thunk-many-passes.s | 70 | ||||
| -rw-r--r-- | lld/test/ELF/linkerscript/symbol-assign-many-passes2.test | 2 |
2 files changed, 71 insertions, 1 deletions
diff --git a/lld/test/ELF/linkerscript/Inputs/arm-thunk-many-passes.s b/lld/test/ELF/linkerscript/Inputs/arm-thunk-many-passes.s new file mode 100644 index 00000000000..d3fa0f6b863 --- /dev/null +++ b/lld/test/ELF/linkerscript/Inputs/arm-thunk-many-passes.s @@ -0,0 +1,70 @@ +// An example of thunk generation that takes the maximum number of permitted +// passes to converge. We start with a set of branches of which all but one are +// in range. Any thunk added to extend the range of a branch is inserted in +// between the branches and the targets which knocks some more branches out +// of range. At the end of 9 passes of createThunks() every branch has a +// range extension thunk, allowing the final pass to check that no more thunks +// are required. +// +// As the size of the .text section changes 9 times, the symbol sym which +// depends on the size of .text will be updated 9 times. This test checks that +// any iteration limit to updating symbols does not limit thunk convergence. +// up to its pass limit without + + .thumb + .section .text.00, "ax", %progbits + .globl _start + .thumb_func +_start: b.w f2 + b.w f2 + b.w f3 + b.w f3 + b.w f4 + b.w f4 + b.w f5 + b.w f5 + b.w f6 + b.w f6 + b.w f7 + b.w f7 + b.w f8 + b.w f8 + b.w f9 + b.w f9 + b.w f10 + b.w f10 + + .section .text.01, "ax", %progbits + .space 14 * 1024 * 1024 +// Thunks are inserted here, initially only 1 branch is out of range and needs +// a thunk. However the added thunk is 4-bytes in size which makes another +// branch out of range, which adds another thunk ... + .section .text.02, "ax", %progbits + .space (2 * 1024 * 1024) - 68 + .thumb_func +f2: bx lr + nop + .thumb_func +f3: bx lr + nop + .thumb_func +f4: bx lr + nop + .thumb_func +f5: bx lr + nop + .thumb_func +f6: bx lr + nop + .thumb_func +f7: bx lr + nop + .thumb_func +f8: bx lr + nop + .thumb_func +f9: bx lr + nop + .thumb_func +f10: bx lr + nop diff --git a/lld/test/ELF/linkerscript/symbol-assign-many-passes2.test b/lld/test/ELF/linkerscript/symbol-assign-many-passes2.test index b8a0624ac30..973a4881850 100644 --- a/lld/test/ELF/linkerscript/symbol-assign-many-passes2.test +++ b/lld/test/ELF/linkerscript/symbol-assign-many-passes2.test @@ -1,5 +1,5 @@ # REQUIRES: arm -# RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-linux-gnueabihf %S/../arm-thunk-many-passes.s -o %t.o +# RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-linux-gnueabihf %S/Inputs/arm-thunk-many-passes.s -o %t.o # RUN: ld.lld %t.o -T %s -o %t # RUN: llvm-nm %t | FileCheck %s |
