1 ; Two occurrences of strlen should be zapped. 2 ; RUN: opt < %s -basicaa -gvn -S | FileCheck %s 3 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-f80:128:128" 4 target triple = "i386-apple-darwin9" 5 6 define i32 @test(i32 %g, i8* %P) nounwind { 7 entry: 8 %tmp2 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1] 9 %tmp3 = icmp eq i32 %tmp2, 100 ; <i1> [#uses=1] 10 %tmp34 = zext i1 %tmp3 to i8 ; <i8> [#uses=1] 11 %toBool = icmp ne i8 %tmp34, 0 ; <i1> [#uses=1] 12 br i1 %toBool, label %bb, label %bb6 13 14 bb: ; preds = %entry 15 br label %bb27 16 17 bb6: ; preds = %entry 18 %tmp8 = add i32 %g, 42 ; <i32> [#uses=2] 19 %tmp10 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1] 20 %tmp11 = icmp eq i32 %tmp10, 100 ; <i1> [#uses=1] 21 %tmp1112 = zext i1 %tmp11 to i8 ; <i8> [#uses=1] 22 %toBool13 = icmp ne i8 %tmp1112, 0 ; <i1> [#uses=1] 23 br i1 %toBool13, label %bb14, label %bb16 24 25 bb14: ; preds = %bb6 26 br label %bb27 27 28 bb16: ; preds = %bb6 29 %tmp18 = mul i32 %tmp8, 2 ; <i32> [#uses=1] 30 %tmp20 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1] 31 %tmp21 = icmp eq i32 %tmp20, 100 ; <i1> [#uses=1] 32 %tmp2122 = zext i1 %tmp21 to i8 ; <i8> [#uses=1] 33 %toBool23 = icmp ne i8 %tmp2122, 0 ; <i1> [#uses=1] 34 br i1 %toBool23, label %bb24, label %bb26 35 36 bb24: ; preds = %bb16 37 br label %bb27 38 39 bb26: ; preds = %bb16 40 br label %bb27 41 42 bb27: ; preds = %bb26, %bb24, %bb14, %bb 43 %tmp.0 = phi i32 [ 11, %bb26 ], [ %tmp18, %bb24 ], [ %tmp8, %bb14 ], [ %g, %bb ] ; <i32> [#uses=1] 44 br label %return 45 46 return: ; preds = %bb27 47 ret i32 %tmp.0 48 } 49 50 ; CHECK: define i32 @test(i32 %g, i8* %P) #0 { 51 ; CHECK: entry: 52 ; CHECK: %tmp2 = call i32 @strlen(i8* %P) #1 53 ; CHECK: %tmp3 = icmp eq i32 %tmp2, 100 54 ; CHECK: %tmp34 = zext i1 %tmp3 to i8 55 ; CHECK: br i1 %tmp3, label %bb, label %bb6 56 ; CHECK: bb: 57 ; CHECK: br label %bb27 58 ; CHECK: bb6: 59 ; CHECK: %tmp8 = add i32 %g, 42 60 ; CHECK: br i1 false, label %bb14, label %bb16 61 ; CHECK: bb14: 62 ; CHECK: br label %bb27 63 ; CHECK: bb16: 64 ; CHECK: %tmp18 = mul i32 %tmp8, 2 65 ; CHECK: br i1 false, label %bb24, label %bb26 66 ; CHECK: bb24: 67 ; CHECK: br label %bb27 68 ; CHECK: bb26: 69 ; CHECK: br label %bb27 70 ; CHECK: bb27: 71 ; CHECK: %tmp.0 = phi i32 [ 11, %bb26 ], [ undef, %bb24 ], [ undef, %bb14 ], [ %g, %bb ] 72 ; CHECK: ret i32 %tmp.0 73 ; CHECK: } 74 75 declare i32 @strlen(i8*) nounwind readonly 76