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| author | Evan Cheng <evan.cheng@apple.com> | 2006-06-24 08:36:10 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2006-06-24 08:36:10 +0000 |
| commit | da08d2c39af6aceaa0230f699c4b53de0e97c2b9 (patch) | |
| tree | 351d962f905c0cd5f351a1a45a971c70cf2e60fa /lib/Target/X86/X86JITInfo.cpp | |
| parent | 89d67faf30ed1a8b5364f53c9a0f5e07a9a0719c (diff) | |
| download | llvm-da08d2c39af6aceaa0230f699c4b53de0e97c2b9.tar.gz llvm-da08d2c39af6aceaa0230f699c4b53de0e97c2b9.tar.bz2 llvm-da08d2c39af6aceaa0230f699c4b53de0e97c2b9.tar.xz | |
Simplify X86CompilationCallback: always align to 16-byte boundary; don't save EAX/EDX if unnecessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28910 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86JITInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86JITInfo.cpp | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/lib/Target/X86/X86JITInfo.cpp b/lib/Target/X86/X86JITInfo.cpp index 87fca4381c..a96b4a67e3 100644 --- a/lib/Target/X86/X86JITInfo.cpp +++ b/lib/Target/X86/X86JITInfo.cpp @@ -57,26 +57,28 @@ extern "C" { #endif "pushl %ebp\n" "movl %esp, %ebp\n" // Standard prologue +#if FASTCC_NUM_INT_ARGS_INREGS > 0 "pushl %eax\n" - "pushl %edx\n" // save EAX/EDX -#if defined(__CYGWIN__) || defined(__MINGW32__) - "call _X86CompilationCallback2\n" -#elif defined(__APPLE__) - "movl 4(%ebp), %eax\n" // load the address of return address - "movl $24, %edx\n" // if the opcode of the instruction at the - "cmpb $-51, (%eax)\n" // return address is our 0xCD marker, then - "movl $12, %eax\n" // subtract 24 from %esp to realign it to 16 - "cmovne %eax, %edx\n" // bytes after the push of edx, the amount to. - "subl %edx, %esp\n" // the push of edx to keep it aligned. - "pushl %edx\n" // subtract. Otherwise, subtract 12 bytes after + "pushl %edx\n" // Save EAX/EDX +#endif +#if defined(__APPLE__) + "andl $-16, %esp\n" // Align ESP on 16-byte boundary +#endif +#if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__APPLE__) "call _X86CompilationCallback2\n" - "popl %edx\n" - "addl %edx, %esp\n" #else - "call X86CompilationCallback2\n" + "call X86CompilationCallback2\n" +#endif +#if defined(__APPLE__) + "movl %ebp, %esp\n" // Restore ESP +#endif +#if FASTCC_NUM_INT_ARGS_INREGS > 0 +#if defined(__APPLE__) + "subl $8, %esp\n" #endif "popl %edx\n" "popl %eax\n" +#endif "popl %ebp\n" "ret\n"); #else |