| ; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s |
| ; Should delete the second call to strlen even though the intervening strchr call exists. |
| |
| 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" |
| target triple = "i386-apple-darwin7" |
| |
| define i8* @test(i8* %P, i8* %Q, i32 %x, i32 %y) nounwind readonly { |
| entry: |
| %0 = tail call i32 @strlen(i8* %P) ; <i32> [#uses=2] |
| %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| br i1 %1, label %bb, label %bb1 |
| |
| bb: ; preds = %entry |
| %2 = sdiv i32 %x, %y ; <i32> [#uses=1] |
| br label %bb1 |
| |
| bb1: ; preds = %bb, %entry |
| %x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] ; <i32> [#uses=1] |
| %3 = tail call i8* @strchr(i8* %Q, i32 97) ; <i8*> [#uses=1] |
| %4 = tail call i32 @strlen(i8* %P) ; <i32> [#uses=1] |
| %5 = add i32 %x_addr.0, %0 ; <i32> [#uses=1] |
| %.sum = sub i32 %5, %4 ; <i32> [#uses=1] |
| %6 = getelementptr i8, i8* %3, i32 %.sum ; <i8*> [#uses=1] |
| ret i8* %6 |
| } |
| |
| ; CHECK: define i8* @test(i8* %P, i8* %Q, i32 %x, i32 %y) #0 { |
| ; CHECK: entry: |
| ; CHECK-NEXT: %0 = tail call i32 @strlen(i8* %P) |
| ; CHECK-NEXT: %1 = icmp eq i32 %0, 0 |
| ; CHECK-NEXT: br i1 %1, label %bb, label %bb1 |
| ; CHECK: bb: |
| ; CHECK-NEXT: %2 = sdiv i32 %x, %y |
| ; CHECK-NEXT: br label %bb1 |
| ; CHECK: bb1: |
| ; CHECK-NEXT: %x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] |
| ; CHECK-NEXT: %3 = tail call i8* @strchr(i8* %Q, i32 97) |
| ; CHECK-NEXT: %4 = add i32 %x_addr.0, %0 |
| ; CHECK-NEXT: %5 = getelementptr i8, i8* %3, i32 %x_addr.0 |
| ; CHECK-NEXT: ret i8* %5 |
| ; CHECK: } |
| |
| declare i32 @strlen(i8*) nounwind readonly |
| |
| declare i8* @strchr(i8*, i32) nounwind readonly |