[Mips] Fix unable to handle inline assembly ends with compat-branch o… (#77291)
…n MIPS
Modify:
Add a global variable 'CurForbiddenSlotAttr' to save current
instruction's forbidden slot and whether set reorder. This is the
judgment condition for whether to add nop. We would add a couple of
'.set noreorder' and '.set reorder' to wrap the current instruction and
the next instruction.
Then we can get previous instruction`s forbidden slot attribute and
whether set reorder by 'CurForbiddenSlotAttr'.
If previous instruction has forbidden slot and .set reorder is active
and current instruction is CTI. Then emit a NOP after it.
Fix https://github.com/llvm/llvm-project/issues/61045.
Because https://reviews.llvm.org/D158589 was 'Needs Review' state, not
ending, so we commit pull request again.
GitOrigin-RevId: 96abee5eef31274415681018553e1d4a16dc16c9
diff --git a/test/ELF/mips-pc-relocs.s b/test/ELF/mips-pc-relocs.s
index 5e7dbed..7d23f9d 100644
--- a/test/ELF/mips-pc-relocs.s
+++ b/test/ELF/mips-pc-relocs.s
@@ -40,11 +40,13 @@
# ^-- (0x20020-0x20000)>>2
# CHECK-NEXT: 20004: beqc $5, $6, 0x20020
# ^-- (0x20020-4-0x20004)>>2
-# CHECK-NEXT: 20008: beqzc $9, 0x20020
-# ^-- (0x20020-4-0x20008)>>2
-# CHECK-NEXT: 2000c: bc 0x20020
-# ^-- (0x20020-4-0x2000c)>>2
-# CHECK-NEXT: 20010: aluipc $2, 0
-# ^-- %hi(0x20020-0x20010)
-# CHECK-NEXT: 20014: addiu $2, $2, 12
-# ^-- %lo(0x20020-0x20014)
+# CHECK-NEXT: 20008: nop
+# CHECK-NEXT: 2000c: beqzc $9, 0x20020
+# ^-- (0x20020-4-0x2000c)>>2
+# CHECK-NEXT: 20010: nop
+# CHECK-NEXT: 20014: bc 0x20020
+# ^-- (0x20020-4-0x200014)>>2
+# CHECK-NEXT: 20018: aluipc $2, 0
+# ^-- %hi(0x20020-0x20018)
+# CHECK-NEXT: 2001c: addiu $2, $2, 4
+# ^-- %lo(0x20020-0x2001c)
