Add a fallthrough instruction.

Change jumps to fallthroughs in the branch relaxation pass before computing the EBB offsets.
2017-04-06 14:22:32 -07:00
parent 5025bb67f4
commit fa4f151b9b
4 changed files with 51 additions and 2 deletions
--- a/cranelift/docs/langref.rst
+++ b/cranelift/docs/langref.rst
@@ -319,6 +319,7 @@ condition is satisfied, otherwise execution continues at the following
 instruction in the EBB.

 .. autoinst:: jump
+.. autoinst:: fallthrough
 .. autoinst:: brz
 .. autoinst:: brnz
 .. autoinst:: br_icmp
--- a/cranelift/filetests/isa/riscv/binary32.cton
+++ b/cranelift/filetests/isa/riscv/binary32.cton
@@ -107,7 +107,7 @@ ebb1:
    ; bgeu 0x004
    br_icmp uge, v2, v1, ebb2           ; bin: 00aaf263

-    jump ebb2
+    fallthrough ebb2

 ebb2:
    ; beq x, %x0