Another test for tail mergeing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36967 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/2007-05-09-tailmerge-2.ll b/test/CodeGen/ARM/2007-05-09-tailmerge-2.ll
new file mode 100644 (file)
index 0000000..70c0777
--- /dev/null
+++ b/test/CodeGen/ARM/2007-05-09-tailmerge-2.ll
@@ -0,0 +1,66 @@
+; RUN: llvm-as < %s | llc -march=arm -enable-tail-merge | grep bl.*baz | wc -l | grep 1
+; RUN: llvm-as < %s | llc -march=arm -enable-tail-merge | grep bl.*quux | wc -l | grep 1
+; Check that calls to baz and quux are tail-merged.
+
+; ModuleID = 'tail.c'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
+target triple = "i686-apple-darwin8"
+
+define i32 @f(i32 %i, i32 %q) {
+entry:
+       %i_addr = alloca i32            ; <i32*> [#uses=2]
+       %q_addr = alloca i32            ; <i32*> [#uses=2]
+       %retval = alloca i32, align 4           ; <i32*> [#uses=1]
+       "alloca point" = bitcast i32 0 to i32           ; <i32> [#uses=0]
+       store i32 %i, i32* %i_addr
+       store i32 %q, i32* %q_addr
+       %tmp = load i32* %i_addr                ; <i32> [#uses=1]
+       %tmp1 = icmp ne i32 %tmp, 0             ; <i1> [#uses=1]
+       %tmp12 = zext i1 %tmp1 to i8            ; <i8> [#uses=1]
+       %toBool = icmp ne i8 %tmp12, 0          ; <i1> [#uses=1]
+       br i1 %toBool, label %cond_true, label %cond_false
+
+cond_true:             ; preds = %entry
+       %tmp3 = call i32 (...)* @bar( )         ; <i32> [#uses=0]
+       %tmp4 = call i32 (...)* @baz( i32 5, i32 6 )            ; <i32> [#uses=0]
+       %tmp7 = load i32* %q_addr               ; <i32> [#uses=1]
+       %tmp8 = icmp ne i32 %tmp7, 0            ; <i1> [#uses=1]
+       %tmp89 = zext i1 %tmp8 to i8            ; <i8> [#uses=1]
+       %toBool10 = icmp ne i8 %tmp89, 0                ; <i1> [#uses=1]
+       br i1 %toBool10, label %cond_true11, label %cond_false15
+
+cond_false:            ; preds = %entry
+       %tmp5 = call i32 (...)* @foo( )         ; <i32> [#uses=0]
+       %tmp6 = call i32 (...)* @baz( i32 5, i32 6 )            ; <i32> [#uses=0]
+       %tmp27 = load i32* %q_addr              ; <i32> [#uses=1]
+       %tmp28 = icmp ne i32 %tmp27, 0          ; <i1> [#uses=1]
+       %tmp289 = zext i1 %tmp28 to i8          ; <i8> [#uses=1]
+       %toBool210 = icmp ne i8 %tmp289, 0              ; <i1> [#uses=1]
+       br i1 %toBool210, label %cond_true11, label %cond_false15
+
+cond_true11:           ; preds = %cond_next
+       %tmp13 = call i32 (...)* @foo( )                ; <i32> [#uses=0]
+       %tmp14 = call i32 (...)* @quux( i32 3, i32 4 )          ; <i32> [#uses=0]
+       br label %cond_next18
+
+cond_false15:          ; preds = %cond_next
+       %tmp16 = call i32 (...)* @bar( )                ; <i32> [#uses=0]
+       %tmp17 = call i32 (...)* @quux( i32 3, i32 4 )          ; <i32> [#uses=0]
+       br label %cond_next18
+
+cond_next18:           ; preds = %cond_false15, %cond_true11
+       %tmp19 = call i32 (...)* @bar( )                ; <i32> [#uses=0]
+       br label %return
+
+return:                ; preds = %cond_next18
+       %retval20 = load i32* %retval           ; <i32> [#uses=1]
+       ret i32 %retval20
+}
+
+declare i32 @bar(...)
+
+declare i32 @baz(...)
+
+declare i32 @foo(...)
+
+declare i32 @quux(...)