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| author | Saleem Abdulrasool <compnerd@compnerd.org> | 2014-03-11 15:09:54 +0000 |
|---|---|---|
| committer | Saleem Abdulrasool <compnerd@compnerd.org> | 2014-03-11 15:09:54 +0000 |
| commit | 0d96f3dd6e123f88313b762fe6d89247fdfa1fe3 (patch) | |
| tree | 0698bfc7827c5a7f17e03346fef6fb2177e2924a /llvm/test/CodeGen/ARM/tail-call.ll | |
| parent | b720a6bab7b81705a8510d01ea2684234369200a (diff) | |
| download | bcm5719-llvm-0d96f3dd6e123f88313b762fe6d89247fdfa1fe3.tar.gz bcm5719-llvm-0d96f3dd6e123f88313b762fe6d89247fdfa1fe3.zip | |
ARM: honour -f{no-,}optimize-sibling-calls
Use the options in the ARMISelLowering to control whether tail calls are
optimised or not. Previously, this option was entirely ignored on the ARM
target and only honoured on x86.
This option is mostly useful in profiling scenarios. The default remains that
tail call optimisations will be applied.
llvm-svn: 203577
Diffstat (limited to 'llvm/test/CodeGen/ARM/tail-call.ll')
| -rw-r--r-- | llvm/test/CodeGen/ARM/tail-call.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/tail-call.ll b/llvm/test/CodeGen/ARM/tail-call.ll new file mode 100644 index 00000000000..270b41d956d --- /dev/null +++ b/llvm/test/CodeGen/ARM/tail-call.ll @@ -0,0 +1,21 @@ +; RUN: llc -mtriple armv7 -O0 -o - < %s | FileCheck %s -check-prefix CHECK-TAIL +; RUN: llc -mtriple armv7 -O0 -disable-tail-calls -o - < %s \ +; RUN: | FileCheck %s -check-prefix CHECK-NO-TAIL + +declare i32 @callee(i32 %i) + +define i32 @caller(i32 %i) { +entry: + %r = tail call i32 @callee(i32 %i) + ret i32 %r +} + +; CHECK-LABEL: caller +; CHECK-TAIL: b callee + +; CHECK-LABEL: caller +; CHECK-NO-TAIL: push {lr} +; CHECK-NO-TAIL: bl callee +; CHECK-NO-TAIL: pop {lr} +; CHECK-NO-TAIL: bx lr + |
