Add indirect tail call (function pointer) examples.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56127 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/X86/tailcallfp.ll b/test/CodeGen/X86/tailcallfp.ll
new file mode 100644
index 0000000..f614935
--- /dev/null
+++ b/test/CodeGen/X86/tailcallfp.ll
@@ -0,0 +1,5 @@
+; 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
+}
diff --git a/test/CodeGen/X86/tailcallfp2.ll b/test/CodeGen/X86/tailcallfp2.ll
new file mode 100644
index 0000000..4fa01f6
--- /dev/null
+++ b/test/CodeGen/X86/tailcallfp2.ll
@@ -0,0 +1,25 @@
+; 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
+}
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