1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 2; RUN: opt -S -passes=newgvn < %s | FileCheck %s 3; Check that loads from calloc are recognized as being zero. 4 5target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 6 7; Function Attrs: nounwind uwtable 8define i32 @test1() { 9; CHECK-LABEL: define i32 @test1() { 10; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias ptr @calloc(i64 1, i64 4) 11; CHECK-NEXT: ret i32 0 12; 13 %1 = tail call noalias ptr @calloc(i64 1, i64 4) 14 ; This load is trivially constant zero 15 %2 = load i32, ptr %1, align 4 16 ret i32 %2 17 18} 19 20declare noalias ptr @calloc(i64, i64) mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) "alloc-family"="malloc" 21