Turn on if-conversion for thumb2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79084 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 93 insertions, 0 deletions

diff --git a/test/CodeGen/Thumb2/thumb2-ifcvt2.ll b/test/CodeGen/Thumb2/thumb2-ifcvt2.ll
new file mode 100644
index 00000000000..9e26da0782e
--- /dev/null
+++ b/test/CodeGen/Thumb2/thumb2-ifcvt2.ll
@@ -0,0 +1,93 @@
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | FileCheck %s
+
+define void @foo(i32 %X, i32 %Y) {
+entry:
+; CHECK: foo:
+; CHECK: it ne
+; CHECK: cmpne
+; CHECK: it hi
+; CHECK: pophi {r7, pc}
+	%tmp1 = icmp ult i32 %X, 4		; <i1> [#uses=1]
+	%tmp4 = icmp eq i32 %Y, 0		; <i1> [#uses=1]
+	%tmp7 = or i1 %tmp4, %tmp1		; <i1> [#uses=1]
+	br i1 %tmp7, label %cond_true, label %UnifiedReturnBlock
+
+cond_true:		; preds = %entry
+	%tmp10 = tail call i32 (...)* @bar( )		; <i32> [#uses=0]
+	ret void
+
+UnifiedReturnBlock:		; preds = %entry
+	ret void
+}
+
+declare i32 @bar(...)
+
+; FIXME: Need post-ifcvt branch folding to get rid of the extra br at end of BB1.
+
+	%struct.quad_struct = type { i32, i32, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct* }
+
+define fastcc i32 @CountTree(%struct.quad_struct* %tree) {
+entry:
+; CHECK: CountTree:
+; CHECK: it eq
+; CHECK: cmpeq
+; CHECK: beq.n
+; CHECK: itt eq
+; CHECK: moveq
+; CHECK: popeq
+	br label %tailrecurse
+
+tailrecurse:		; preds = %bb, %entry
+	%tmp6 = load %struct.quad_struct** null		; <%struct.quad_struct*> [#uses=1]
+	%tmp9 = load %struct.quad_struct** null		; <%struct.quad_struct*> [#uses=2]
+	%tmp12 = load %struct.quad_struct** null		; <%struct.quad_struct*> [#uses=1]
+	%tmp14 = icmp eq %struct.quad_struct* null, null		; <i1> [#uses=1]
+	%tmp17 = icmp eq %struct.quad_struct* %tmp6, null		; <i1> [#uses=1]
+	%tmp23 = icmp eq %struct.quad_struct* %tmp9, null		; <i1> [#uses=1]
+	%tmp29 = icmp eq %struct.quad_struct* %tmp12, null		; <i1> [#uses=1]
+	%bothcond = and i1 %tmp17, %tmp14		; <i1> [#uses=1]
+	%bothcond1 = and i1 %bothcond, %tmp23		; <i1> [#uses=1]
+	%bothcond2 = and i1 %bothcond1, %tmp29		; <i1> [#uses=1]
+	br i1 %bothcond2, label %return, label %bb
+
+bb:		; preds = %tailrecurse
+	%tmp41 = tail call fastcc i32 @CountTree( %struct.quad_struct* %tmp9 )		; <i32> [#uses=0]
+	br label %tailrecurse
+
+return:		; preds = %tailrecurse
+	ret i32 0
+}
+
+	%struct.SString = type { i8*, i32, i32 }
+
+declare void @abort()
+
+define fastcc void @t1(%struct.SString* %word, i8 signext  %c) {
+entry:
+; CHECK: t1:
+; CHECK: it ne
+; CHECK: popne {r7, pc}
+	%tmp1 = icmp eq %struct.SString* %word, null		; <i1> [#uses=1]
+	br i1 %tmp1, label %cond_true, label %cond_false
+
+cond_true:		; preds = %entry
+	tail call void @abort( )
+	unreachable
+
+cond_false:		; preds = %entry
+	ret void
+}
+
+define fastcc void @t2() nounwind {
+entry:
+; CHECK: t2:
+; CHECK: cmp r0, #0
+; CHECK: bne.n
+	br i1 undef, label %bb.i.i3, label %growMapping.exit
+
+bb.i.i3:		; preds = %entry
+	unreachable
+
+growMapping.exit:		; preds = %entry
+	unreachable
+}