test/Transforms/NewGVN/calls-readonly.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt < %s -passes=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 ptr @test(ptr %P, ptr %Q, i32 %x, i32 %y) nounwind readonly {
; CHECK-LABEL: define ptr @test(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 @strlen(ptr [[P]])
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB:%.*]], label [[BB1:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[TMP2:%.*]] = sdiv i32 [[X]], [[Y]]
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[X_ADDR_0:%.*]] = phi i32 [ [[TMP2]], [[BB]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = tail call ptr @strchr(ptr [[Q]], i32 97)
; CHECK-NEXT:    [[TMP4:%.*]] = add i32 [[X_ADDR_0]], [[TMP0]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i8, ptr [[TMP3]], i32 [[X_ADDR_0]]
; CHECK-NEXT:    ret ptr [[TMP5]]
;
entry:
  %0 = tail call i32 @strlen(ptr %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 ptr @strchr(ptr %Q, i32 97)      ; <ptr> [#uses=1]
  %4 = tail call i32 @strlen(ptr %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, ptr %3, i32 %.sum            ; <ptr> [#uses=1]
  ret ptr %6
}


declare i32 @strlen(ptr) nounwind readonly

declare ptr @strchr(ptr, i32) nounwind readonly