- Bug fixes.

- Allow icmp rewrite using an iv / stride of a smaller integer type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43480 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 66 insertions, 0 deletions

diff --git a/test/CodeGen/X86/loop-strength-reduce6.ll b/test/CodeGen/X86/loop-strength-reduce6.ll
new file mode 100644
index 0000000..fa8b57a
--- /dev/null
+++ b/test/CodeGen/X86/loop-strength-reduce6.ll
@@ -0,0 +1,66 @@
+; RUN: llvm-as < %s | llc -march=x86-64 | not grep inc
+
+define fastcc i32 @decodeMP3(i32 %isize, i32* %done) {
+entry:
+	br i1 false, label %cond_next191, label %cond_true189
+
+cond_true189:		; preds = %entry
+	ret i32 0
+
+cond_next191:		; preds = %entry
+	br i1 false, label %cond_next37.i, label %cond_false.i9
+
+cond_false.i9:		; preds = %cond_next191
+	ret i32 0
+
+cond_next37.i:		; preds = %cond_next191
+	br i1 false, label %cond_false50.i, label %cond_true44.i
+
+cond_true44.i:		; preds = %cond_next37.i
+	br i1 false, label %cond_true11.i.i, label %bb414.preheader.i
+
+cond_true11.i.i:		; preds = %cond_true44.i
+	ret i32 0
+
+cond_false50.i:		; preds = %cond_next37.i
+	ret i32 0
+
+bb414.preheader.i:		; preds = %cond_true44.i
+	br i1 false, label %bb.i18, label %do_layer3.exit
+
+bb.i18:		; preds = %bb414.preheader.i
+	br i1 false, label %bb358.i, label %cond_true79.i
+
+cond_true79.i:		; preds = %bb.i18
+	ret i32 0
+
+bb331.i:		; preds = %bb358.i, %cond_true.i149.i
+	br i1 false, label %cond_true.i149.i, label %cond_false.i151.i
+
+cond_true.i149.i:		; preds = %bb331.i
+	br i1 false, label %bb178.preheader.i.i, label %bb331.i
+
+cond_false.i151.i:		; preds = %bb331.i
+	ret i32 0
+
+bb163.i.i:		; preds = %bb178.preheader.i.i, %bb163.i.i
+	%rawout2.451.rec.i.i = phi i64 [ 0, %bb178.preheader.i.i ], [ %indvar.next260.i, %bb163.i.i ]		; <i64> [#uses=2]
+	%i.052.i.i = trunc i64 %rawout2.451.rec.i.i to i32		; <i32> [#uses=1]
+	%tmp165.i144.i = shl i32 %i.052.i.i, 5		; <i32> [#uses=1]
+	%tmp165169.i.i = sext i32 %tmp165.i144.i to i64		; <i64> [#uses=0]
+	%indvar.next260.i = add i64 %rawout2.451.rec.i.i, 1		; <i64> [#uses=2]
+	%exitcond261.i = icmp eq i64 %indvar.next260.i, 18		; <i1> [#uses=1]
+	br i1 %exitcond261.i, label %bb178.preheader.i.i, label %bb163.i.i
+
+bb178.preheader.i.i:		; preds = %bb163.i.i, %cond_true.i149.i
+	br label %bb163.i.i
+
+bb358.i:		; preds = %bb.i18
+	br i1 false, label %bb331.i, label %bb406.i
+
+bb406.i:		; preds = %bb358.i
+	ret i32 0
+
+do_layer3.exit:		; preds = %bb414.preheader.i
+	ret i32 0
+}