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| author | Arnold Schwaighofer <arnold.schwaighofer@gmail.com> | 2008-09-11 20:28:43 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <arnold.schwaighofer@gmail.com> | 2008-09-11 20:28:43 +0000 |
| commit | 1fdc40f0622375f7f9a4ccfbbf5deda68131f6e0 (patch) | |
| tree | 1adb5c9337e0781b0f24c9e495327125110c8909 | |
| parent | 8db866808c803f9bdcd45c56a042fedd8cccd5bc (diff) | |
| download | llvm-1fdc40f0622375f7f9a4ccfbbf5deda68131f6e0.tar.gz llvm-1fdc40f0622375f7f9a4ccfbbf5deda68131f6e0.tar.bz2 llvm-1fdc40f0622375f7f9a4ccfbbf5deda68131f6e0.tar.xz | |
When tailcallopt is enabled all fastcc calls must have an aligned argument stack size. Add a test case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56119 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/tailcall-stackalign.ll | 24 |
2 files changed, 25 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index ea9201ca49..010d813a41 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -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; diff --git a/test/CodeGen/X86/tailcall-stackalign.ll b/test/CodeGen/X86/tailcall-stackalign.ll new file mode 100644 index 0000000000..80111925ee --- /dev/null +++ b/test/CodeGen/X86/tailcall-stackalign.ll @@ -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 +} + + + + |