1 ; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s 2 ; Should delete the second call to strlen even though the intervening strchr call exists. 3 4 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" 5 target triple = "i386-apple-darwin7" 6 7 define i8* @test(i8* %P, i8* %Q, i32 %x, i32 %y) nounwind readonly { 8 entry: 9 %0 = tail call i32 @strlen(i8* %P) ; <i32> [#uses=2] 10 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 11 br i1 %1, label %bb, label %bb1 12 13 bb: ; preds = %entry 14 %2 = sdiv i32 %x, %y ; <i32> [#uses=1] 15 br label %bb1 16 17 bb1: ; preds = %bb, %entry 18 %x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] ; <i32> [#uses=1] 19 %3 = tail call i8* @strchr(i8* %Q, i32 97) ; <i8*> [#uses=1] 20 %4 = tail call i32 @strlen(i8* %P) ; <i32> [#uses=1] 21 %5 = add i32 %x_addr.0, %0 ; <i32> [#uses=1] 22 %.sum = sub i32 %5, %4 ; <i32> [#uses=1] 23 %6 = getelementptr i8, i8* %3, i32 %.sum ; <i8*> [#uses=1] 24 ret i8* %6 25 } 26 27 ; CHECK: define i8* @test(i8* %P, i8* %Q, i32 %x, i32 %y) #0 { 28 ; CHECK: entry: 29 ; CHECK-NEXT: %0 = tail call i32 @strlen(i8* %P) 30 ; CHECK-NEXT: %1 = icmp eq i32 %0, 0 31 ; CHECK-NEXT: br i1 %1, label %bb, label %bb1 32 ; CHECK: bb: 33 ; CHECK-NEXT: %2 = sdiv i32 %x, %y 34 ; CHECK-NEXT: br label %bb1 35 ; CHECK: bb1: 36 ; CHECK-NEXT: %x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] 37 ; CHECK-NEXT: %3 = tail call i8* @strchr(i8* %Q, i32 97) 38 ; CHECK-NEXT: %4 = add i32 %x_addr.0, %0 39 ; CHECK-NEXT: %5 = getelementptr i8, i8* %3, i32 %x_addr.0 40 ; CHECK-NEXT: ret i8* %5 41 ; CHECK: } 42 43 declare i32 @strlen(i8*) nounwind readonly 44 45 declare i8* @strchr(i8*, i32) nounwind readonly 46
