mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-22 04:22:57 +02:00
aa4f835b48
Allow instructions such as 'cmp w0, #(end - start)' by folding the expression into a constant. For ELF, we fold only if the symbols are in the same section. For MachO, we fold if the expression contains only symbols that are not linker visible. Fixes https://llvm.org/bugs/show_bug.cgi?id=18920 Differential Revision: https://reviews.llvm.org/D23834 llvm-svn: 283862
97 lines
1.9 KiB
ArmAsm
97 lines
1.9 KiB
ArmAsm
// RUN: llvm-mc -triple aarch64-elf -filetype=obj %s -o - | llvm-objdump -d - | FileCheck %s
|
|
|
|
start:
|
|
.space 8
|
|
end:
|
|
// CHECK-LABEL: end:
|
|
|
|
adds w0, w1, #(end - start)
|
|
adds x0, x1, #(end - start)
|
|
add w0, w1, #(end - start)
|
|
add x0, x1, #(end - start)
|
|
cmp w0, #(end - start)
|
|
cmp x0, #(end - start)
|
|
sub w0, w1, #(end - start)
|
|
sub x0, x1, #(end - start)
|
|
// CHECK: adds w0, w1, #8
|
|
// CHECK: adds x0, x1, #8
|
|
// CHECK: add w0, w1, #8
|
|
// CHECK: add x0, x1, #8
|
|
// CHECK: cmp w0, #8
|
|
// CHECK: cmp x0, #8
|
|
// CHECK: sub w0, w1, #8
|
|
// CHECK: sub x0, x1, #8
|
|
|
|
add w0, w1, #(end - start), lsl #12
|
|
cmp w0, #(end - start), lsl #12
|
|
// CHECK: add w0, w1, #8, lsl #12
|
|
// CHECK: cmp w0, #8, lsl #12
|
|
|
|
add w0, w1, #((end - start) >> 2)
|
|
cmp w0, #((end - start) >> 2)
|
|
// CHECK: add w0, w1, #2
|
|
// CHECK: cmp w0, #2
|
|
|
|
add w0, w1, #(end - start + 12)
|
|
cmp w0, #(end - start + 12)
|
|
// CHECK: add w0, w1, #20
|
|
// CHECK: cmp w0, #20
|
|
|
|
add w0, w1, #(forward - end)
|
|
cmp w0, #(forward - end)
|
|
// CHECK: add w0, w1, #320
|
|
// CHECK: cmp w0, #320
|
|
|
|
// Add some filler so we don't have to modify #(forward - end) if we add more
|
|
// instructions above
|
|
.Lfiller:
|
|
.space 320 - (.Lfiller - end)
|
|
|
|
forward:
|
|
.space 8
|
|
|
|
.Lstart:
|
|
.space 8
|
|
.Lend:
|
|
add w0, w1, #(.Lend - .Lstart)
|
|
cmp w0, #(.Lend - .Lstart)
|
|
// CHECK: add w0, w1, #8
|
|
// CHECK: cmp w0, #8
|
|
|
|
.Lprivate1:
|
|
.space 8
|
|
notprivate:
|
|
.space 8
|
|
.Lprivate2:
|
|
add w0, w1, #(.Lprivate2 - .Lprivate1)
|
|
cmp w0, #(.Lprivate2 - .Lprivate1)
|
|
// CHECK: add w0, w1, #16
|
|
// CHECK: cmp w0, #16
|
|
|
|
.type foo, @function
|
|
foo:
|
|
// CHECK-LABEL: foo:
|
|
|
|
add w0, w1, #(foo - .Lprivate2)
|
|
cmp w0, #(foo - .Lprivate2)
|
|
// CHECK: add w0, w1, #8
|
|
// CHECK: cmp w0, #8
|
|
|
|
ret
|
|
|
|
.type goo, @function
|
|
goo:
|
|
// CHECK-LABEL: goo:
|
|
|
|
add w0, w1, #(goo - foo)
|
|
cmp w0, #(goo - foo)
|
|
// CHECK: add w0, w1, #12
|
|
// CHECK: cmp w0, #12
|
|
|
|
add w0, w1, #(. - goo)
|
|
cmp w0, #(. - goo)
|
|
// CHECK: add w0, w1, #8
|
|
// CHECK: cmp w0, #12
|
|
|
|
ret
|