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authorTorok Edwin <edwintorok@gmail.com>2008-10-24 19:23:07 +0000
committerTorok Edwin <edwintorok@gmail.com>2008-10-24 19:23:07 +0000
commit61df3b751acaf4b3dd5e77e8fe8daac1e14544e9 (patch)
treeb0fd09c3fc18404e4038505db616818bf6ee94a6 /lib/Target/README.txt
parentdb1b3bc2763b5c28742b913984cfe600a3917f62 (diff)
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move the note to the correct README
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58104 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
-rw-r--r--lib/Target/README.txt95
1 files changed, 0 insertions, 95 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index b3018b21dd..c4161c36c3 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -984,98 +984,3 @@ define i1 @test(i8 %x) {
}
//===---------------------------------------------------------------------===//
-
-This code:
-
-int foo(const char *str,...)
-{
- __builtin_va_list a; int x;
- __builtin_va_start(a,str); x = __builtin_va_arg(a,int); __builtin_va_end(a);
- return x;
-}
-
-gets compiled into this on x86-64:
- subq $200, %rsp
- movaps %xmm7, 160(%rsp)
- movaps %xmm6, 144(%rsp)
- movaps %xmm5, 128(%rsp)
- movaps %xmm4, 112(%rsp)
- movaps %xmm3, 96(%rsp)
- movaps %xmm2, 80(%rsp)
- movaps %xmm1, 64(%rsp)
- movaps %xmm0, 48(%rsp)
- movq %r9, 40(%rsp)
- movq %r8, 32(%rsp)
- movq %rcx, 24(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 8(%rsp)
- leaq (%rsp), %rax
- movq %rax, 192(%rsp)
- leaq 208(%rsp), %rax
- movq %rax, 184(%rsp)
- movl $48, 180(%rsp)
- movl $8, 176(%rsp)
- movl 176(%rsp), %eax
- cmpl $47, %eax
- jbe .LBB1_3 # bb
-.LBB1_1: # bb3
- movq 184(%rsp), %rcx
- leaq 8(%rcx), %rax
- movq %rax, 184(%rsp)
-.LBB1_2: # bb4
- movl (%rcx), %eax
- addq $200, %rsp
- ret
-.LBB1_3: # bb
- movl %eax, %ecx
- addl $8, %eax
- addq 192(%rsp), %rcx
- movl %eax, 176(%rsp)
- jmp .LBB1_2 # bb4
-
-gcc 4.3 generates:
- subq $96, %rsp
-.LCFI0:
- leaq 104(%rsp), %rax
- movq %rsi, -80(%rsp)
- movl $8, -120(%rsp)
- movq %rax, -112(%rsp)
- leaq -88(%rsp), %rax
- movq %rax, -104(%rsp)
- movl $8, %eax
- cmpl $48, %eax
- jb .L6
- movq -112(%rsp), %rdx
- movl (%rdx), %eax
- addq $96, %rsp
- ret
- .p2align 4,,10
- .p2align 3
-.L6:
- mov %eax, %edx
- addq -104(%rsp), %rdx
- addl $8, %eax
- movl %eax, -120(%rsp)
- movl (%rdx), %eax
- addq $96, %rsp
- ret
-
-and it gets compiled into this on x86:
- pushl %ebp
- movl %esp, %ebp
- subl $4, %esp
- leal 12(%ebp), %eax
- movl %eax, -4(%ebp)
- leal 16(%ebp), %eax
- movl %eax, -4(%ebp)
- movl 12(%ebp), %eax
- addl $4, %esp
- popl %ebp
- ret
-
-gcc 4.3 generates:
- pushl %ebp
- movl %esp, %ebp
- movl 12(%ebp), %eax
- popl %ebp
- ret