1; RUN: opt < %s -basicaa -gvn -S | FileCheck %s 2 3; The input *.ll is obtained by manually annotating "invariant.load" to the 4; two loads. With "invariant.load" metadata, the second load is redundant. 5; 6; int foo(int *p, char *q) { 7; *q = (char)*p; 8; return *p + 1; 9; } 10 11define i32 @foo(i32* nocapture %p, i8* nocapture %q) { 12entry: 13 %0 = load i32* %p, align 4, !tbaa !0, !invariant.load !3 14 %conv = trunc i32 %0 to i8 15 store i8 %conv, i8* %q, align 1, !tbaa !1 16 %1 = load i32* %p, align 4, !tbaa !0, !invariant.load !3 17 %add = add nsw i32 %1, 1 18 ret i32 %add 19 20; CHECK: foo 21; CHECK: %0 = load i32* %p 22; CHECK: store i8 %conv, i8* %q, 23; CHECK: %add = add nsw i32 %0, 1 24} 25 26!0 = metadata !{metadata !"int", metadata !1} 27!1 = metadata !{metadata !"omnipotent char", metadata !2} 28!2 = metadata !{metadata !"Simple C/C++ TBAA"} 29!3 = metadata !{} 30