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Add indirect tail call (function pointer) examples.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer 2008-09-11 22:24:28 +00:00
parent e5d20f947a
commit 363f53f3ec
2 changed files with 30 additions and 0 deletions
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5
test/CodeGen/X86/tailcallfp.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel -tailcallopt | not grep call
define fastcc i32 @bar(i32 %X, i32(double, i32) *%FP) {
%Y = tail call fastcc i32 %FP(double 0.0, i32 %X)
ret i32 %Y
}

25
test/CodeGen/X86/tailcallfp2.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 -tailcallopt | grep {jmp} | grep {\\*%ecx}
declare i32 @putchar(i32)
define fastcc i32 @checktail(i32 %x, i32* %f, i32 %g) {
%tmp1 = icmp sgt i32 %x, 0
br i1 %tmp1, label %if-then, label %if-else
if-then:
%fun_ptr = bitcast i32* %f to i32(i32, i32*, i32)*
%arg1 = add i32 %x, -1
call i32 @putchar(i32 90)
%res = tail call fastcc i32 %fun_ptr( i32 %arg1, i32 * %f, i32 %g)
ret i32 %res
if-else:
ret i32 %x
}
define i32 @main() {
%f = bitcast i32 (i32, i32*, i32)* @checktail to i32*
%res = tail call fastcc i32 @checktail( i32 10, i32* %f,i32 10)
ret i32 %res
}