[llvm-commits] [llvm] r65002 - in /llvm/branches/Apple/Dib/test/Transforms: IndVarSimplify/ IndVarSimplify/preserve-signed-wrap.ll IndVarsSimplify/

[Bill Wendling]

Author: void
Date: Wed Feb 18 21:51:41 2009
New Revision: 65002

URL: http://llvm.org/viewvc/llvm-project?rev=65002&view=rev
Log:
Rename IndVarsSimplify to IndVarSimplify. Add preserve-signed-wrap.ll.

Added:
    llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/
      - copied from r65001, llvm/branches/Apple/Dib/test/Transforms/IndVarsSimplify/
    llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/preserve-signed-wrap.ll
Removed:
    llvm/branches/Apple/Dib/test/Transforms/IndVarsSimplify/

Added: llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/preserve-signed-wrap.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/preserve-signed-wrap.ll?rev=65002&view=auto

==============================================================================
--- llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/preserve-signed-wrap.ll (added)
+++ llvm/branches/Apple/Dib/test/Transforms/IndVarSimplify/preserve-signed-wrap.ll Wed Feb 18 21:51:41 2009
@@ -0,0 +1,39 @@
+; RUN: llvm-as < %s | opt -indvars | llvm-dis > %t
+; RUN: grep sext %t | count 2
+; RUN: grep { = sext i32 %n to i64} %t
+; RUN: grep phi %t | count 1
+; RUN: grep {phi i64} %t
+
+; Indvars should insert a 64-bit induction variable to eliminate the
+; sext for the addressing, however it shouldn't eliminate the sext
+; on the other phi, since that value undergoes signed wrapping.
+
+define void @foo(i32* nocapture %d, i32 %n) nounwind {
+entry:
+	%0 = icmp sgt i32 %n, 0		; <i1> [#uses=1]
+	br i1 %0, label %bb.nph, label %return
+
+bb.nph:		; preds = %entry
+	br label %bb
+
+bb:		; preds = %bb1, %bb.nph
+	%i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ]		; <i32> [#uses=2]
+	%p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ]		; <i8> [#uses=2]
+	%1 = sext i8 %p.01 to i32		; <i32> [#uses=1]
+	%2 = sext i32 %i.02 to i64		; <i64> [#uses=1]
+	%3 = getelementptr i32* %d, i64 %2		; <i32*> [#uses=1]
+	store i32 %1, i32* %3, align 4
+	%4 = add i8 %p.01, 1		; <i8> [#uses=1]
+	%5 = add i32 %i.02, 1		; <i32> [#uses=2]
+	br label %bb1
+
+bb1:		; preds = %bb
+	%6 = icmp slt i32 %5, %n		; <i1> [#uses=1]
+	br i1 %6, label %bb, label %bb1.return_crit_edge
+
+bb1.return_crit_edge:		; preds = %bb1
+	br label %return
+
+return:		; preds = %bb1.return_crit_edge, %entry
+	ret void
+}