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author | Derek Schuff <dschuff@google.com> | 2012-04-30 16:57:15 +0000 |
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committer | Derek Schuff <dschuff@google.com> | 2012-04-30 16:57:15 +0000 |
commit | b051adf26382d4169cc496a50da7c0a70cd71898 (patch) | |
tree | 085e3ad7fa6296f84c6f96a68ae8d42c16cb7efc /llvm/test/CodeGen/X86/fast-isel-x86.ll | |
parent | 9245c936566d119c908cabdca16cd31b93da3ca3 (diff) | |
download | bcm5719-llvm-b051adf26382d4169cc496a50da7c0a70cd71898.tar.gz bcm5719-llvm-b051adf26382d4169cc496a50da7c0a70cd71898.zip |
Fix fastcc structure return with fast-isel on x86-32
On x86-32, structure return via sret lets the callee pop the hidden
pointer argument off the stack, which the caller then re-pushes.
However if the calling convention is fastcc, then a register is used
instead, and the caller should not adjust the stack. This is
implemented with a check of IsTailCallConvention
X86TargetLowering::LowerCall but is now checked properly in
X86FastISel::DoSelectCall.
(this time, actually commit what was reviewed!)
llvm-svn: 155825
Diffstat (limited to 'llvm/test/CodeGen/X86/fast-isel-x86.ll')
-rw-r--r-- | llvm/test/CodeGen/X86/fast-isel-x86.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/fast-isel-x86.ll b/llvm/test/CodeGen/X86/fast-isel-x86.ll index b9598bb465c..19f38882a6c 100644 --- a/llvm/test/CodeGen/X86/fast-isel-x86.ll +++ b/llvm/test/CodeGen/X86/fast-isel-x86.ll @@ -46,3 +46,17 @@ entry: ; CHECK: addl $40 } declare void @test3sret(%struct.a* sret) + +; Check that fast-isel sret works with fastcc (and does not callee-pop) +define void @test4() nounwind ssp { +entry: + %tmp = alloca %struct.a, align 8 + call fastcc void @test4fastccsret(%struct.a* sret %tmp) + ret void +; CHECK: test4: +; CHECK: subl $28 +; CHECK: leal (%esp), %ecx +; CHECK: calll _test4fastccsret +; CHECK addl $28 +} +declare fastcc void @test4fastccsret(%struct.a* sret) |