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| author | Arnold Schwaighofer <arnold.schwaighofer@gmail.com> | 2008-04-30 09:16:33 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <arnold.schwaighofer@gmail.com> | 2008-04-30 09:16:33 +0000 |
| commit | a0032726c05cbb509988f05746de940adcbdf20d (patch) | |
| tree | 7a4da70d35c785bd6bd03768b4bf7ba3c42e24d2 /test/CodeGen | |
| parent | 21ecd91d4b61fea006cd674a1e51d99a69b85d26 (diff) | |
| download | external_llvm-a0032726c05cbb509988f05746de940adcbdf20d.zip external_llvm-a0032726c05cbb509988f05746de940adcbdf20d.tar.gz external_llvm-a0032726c05cbb509988f05746de940adcbdf20d.tar.bz2 | |
Tail call optimization improvements:
Move platform independent code (lowering of possibly overwritten
arguments, check for tail call optimization eligibility) from
target X86ISelectionLowering.cpp to TargetLowering.h and
SelectionDAGISel.cpp.
Initial PowerPC tail call implementation:
Support ppc32 implemented and tested (passes my tests and
test-suite llvm-test).
Support ppc64 implemented and half tested (passes my tests).
On ppc tail call optimization is performed if
caller and callee are fastcc
call is a tail call (in tail call position, call followed by ret)
no variable argument lists or byval arguments
option -tailcallopt is enabled
Supported:
* non pic tail calls on linux/darwin
* module-local tail calls on linux(PIC/GOT)/darwin(PIC)
* inter-module tail calls on darwin(PIC)
If constraints are not met a normal call will be emitted.
A test checking the argument lowering behaviour on x86-64 was added.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50477 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/PowerPC/tailcall1-64.ll | 11 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/tailcall1.ll | 11 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/tailcallpic1.ll | 14 |
3 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/tailcall1-64.ll b/test/CodeGen/PowerPC/tailcall1-64.ll new file mode 100644 index 0000000..f39b40b --- /dev/null +++ b/test/CodeGen/PowerPC/tailcall1-64.ll @@ -0,0 +1,11 @@ +; RUN: llvm-as < %s | llc -march=ppc64 -tailcallopt | grep TC_RETURNd8 +define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) { +entry: + ret i32 %a3 +} + +define fastcc i32 @tailcaller(i32 %in1, i32 %in2) { +entry: + %tmp11 = tail call fastcc i32 @tailcallee( i32 %in1, i32 %in2, i32 %in1, i32 %in2 ) ; <i32> [#uses=1] + ret i32 %tmp11 +} diff --git a/test/CodeGen/PowerPC/tailcall1.ll b/test/CodeGen/PowerPC/tailcall1.ll new file mode 100644 index 0000000..1fc4b94 --- /dev/null +++ b/test/CodeGen/PowerPC/tailcall1.ll @@ -0,0 +1,11 @@ +; RUN: llvm-as < %s | llc -march=ppc32 -tailcallopt | grep TC_RETURN +define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) { +entry: + ret i32 %a3 +} + +define fastcc i32 @tailcaller(i32 %in1, i32 %in2) { +entry: + %tmp11 = tail call fastcc i32 @tailcallee( i32 %in1, i32 %in2, i32 %in1, i32 %in2 ) ; <i32> [#uses=1] + ret i32 %tmp11 +} diff --git a/test/CodeGen/PowerPC/tailcallpic1.ll b/test/CodeGen/PowerPC/tailcallpic1.ll new file mode 100644 index 0000000..678d366 --- /dev/null +++ b/test/CodeGen/PowerPC/tailcallpic1.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llc -tailcallopt -mtriple=powerpc-apple-darwin -relocation-model=pic | grep TC_RETURN + + + +define protected fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) { +entry: + ret i32 %a3 +} + +define fastcc i32 @tailcaller(i32 %in1, i32 %in2) { +entry: + %tmp11 = tail call fastcc i32 @tailcallee( i32 %in1, i32 %in2, i32 %in1, i32 %in2 ) ; <i32> [#uses=1] + ret i32 %tmp11 +} |