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 11 define i32 @foo(i32* nocapture %p, i8* nocapture %q) { 12 entry: 13 %0 = load i32, i32* %p, align 4, !invariant.load !3 14 %conv = trunc i32 %0 to i8 15 store i8 %conv, i8* %q, align 1 16 %1 = load i32, i32* %p, align 4, !invariant.load !3 17 %add = add nsw i32 %1, 1 18 ret i32 %add 19 20 ; CHECK: foo 21 ; CHECK: %0 = load i32, i32* %p 22 ; CHECK: store i8 %conv, i8* %q, 23 ; CHECK: %add = add nsw i32 %0, 1 24 } 25 26 !3 = !{} 27
