llvm-project/llvm/test/CodeGen/X86/switch-default-only.ll

; RUN: llc -O0 -fast-isel=false -mtriple=i686-- < %s | FileCheck %s

; No need for branching when the default and only destination follows
; immediately after the switch.
; CHECK-LABEL: no_branch:
; CHECK-NOT: jmp
; CHECK: ret

define void @no_branch(i32 %x) {
entry:
  switch i32 %x, label %exit [ ]
exit:
  ret void
}
X86: Do not use llc -march in tests. `llc -march` is problematic because it only switches the target architecture, but leaves the operating system unchanged. This occasionally leads to indeterministic tests because the OS from LLVM_DEFAULT_TARGET_TRIPLE is used. However we can simply always use `llc -mtriple` instead. This changes all the tests to do this to avoid people using -march when they copy and paste parts of tests. See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309774 2017-08-02 08:28:10 +08:00			`; RUN: llc -O0 -fast-isel=false -mtriple=i686-- < %s \| FileCheck %s`
Switch lowering: Fix broken 'Figure out which block is next' code This doesn't seem to have worked in a long time, but other optimizations would clean it up. llvm-svn: 222961 2014-11-30 05:17:05 +08:00
			`; No need for branching when the default and only destination follows`
			`; immediately after the switch.`
			`; CHECK-LABEL: no_branch:`
			`; CHECK-NOT: jmp`
			`; CHECK: ret`

			`define void @no_branch(i32 %x) {`
			`entry:`
			`switch i32 %x, label %exit [ ]`
			`exit:`
			`ret void`
			`}`