1; RUN: opt < %s -passes=gvn -S | FileCheck %s 2; Should delete the second call to strlen even though the intervening strchr call exists. 3 4target 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" 5target triple = "i386-apple-darwin7" 6 7define ptr @test(ptr %P, ptr %Q, i32 %x, i32 %y) nounwind readonly { 8entry: 9 %0 = tail call i32 @strlen(ptr %P), !prof !0 ; <i32> [#uses=2] 10 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 11 br i1 %1, label %bb, label %bb1 12 13bb: ; preds = %entry 14 %2 = sdiv i32 %x, %y ; <i32> [#uses=1] 15 br label %bb1 16 17bb1: ; preds = %bb, %entry 18 %x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] ; <i32> [#uses=1] 19 %3 = tail call ptr @strchr(ptr %Q, i32 97) ; <ptr> [#uses=1] 20 %4 = tail call i32 @strlen(ptr %P) , !prof !1 ; <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, ptr %3, i32 %.sum ; <ptr> [#uses=1] 24 ret ptr %6 25} 26 27; CHECK: define ptr @test(ptr %P, ptr %Q, i32 %x, i32 %y) #0 { 28; CHECK: entry: 29; CHECK-NEXT: %0 = tail call i32 @strlen(ptr %P), !prof !0 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 ptr @strchr(ptr %Q, i32 97) 38; CHECK-NEXT: %4 = add i32 %x_addr.0, %0 39; CHECK-NEXT: %5 = getelementptr i8, ptr %3, i32 %x_addr.0 40; CHECK-NEXT: ret ptr %5 41; CHECK: } 42 43declare i32 @strlen(ptr) nounwind readonly 44 45declare ptr @strchr(ptr, i32) nounwind readonly 46 47!0 = !{!"branch_weights", i32 95} 48!1 = !{!"branch_weights", i32 95} 49