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| ; RUN: opt < %s -basicaa -gvn -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
|