6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-10 04:33:40 +00:00
Code Issues Projects Releases Wiki Activity

When tailcallopt is enabled all fastcc calls must have an aligned argument stack size. Add a test case.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56119 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer 2008-09-11 20:28:43 +00:00
parent 8db866808c
commit 1fdc40f062
2 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1488,7 +1488,7 @@ SDValue X86TargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG) {
// Get a count of how many bytes are to be pushed on the stack.
unsigned NumBytes = CCInfo.getNextStackOffset();
if (IsTailCall)
if (PerformTailCallOpt && CC == CallingConv::Fast)
NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
int FPDiff = 0;

24
test/CodeGen/X86/tailcall-stackalign.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llvm-as < %s | llc -mtriple=i686-unknown-linux -tailcallopt | grep -A 1 call | grep -A 1 tailcaller | grep subl | grep 20
; Linux has 8 byte alignment so the params cause stack size 20 when tailcallopt
; is enabled, ensure that a normal fastcc call has matching stack size
define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
ret i32 %a3
}
define fastcc i32 @tailcaller(i32 %in1, i32 %in2, i32 %in3, i32 %in4) {
%tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2,
i32 %in1, i32 %in2)
ret i32 %tmp11
}
define i32 @main(i32 %argc, i8** %argv) {
%tmp1 = call fastcc i32 @tailcaller( i32 1, i32 2, i32 3, i32 4 )
; expect match subl [stacksize] here
ret i32 0
}