1 ; Test that FFSOpt works correctly
2 ; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
4 ; CHECK-NOT: call{{.*}}@ffs
6 @non_const = external global i32 ; <i32*> [#uses=1]
10 declare i32 @ffsl(i32)
12 declare i32 @ffsll(i64)
15 %arg = load i32* @non_const ; <i32> [#uses=1]
16 %val0 = call i32 @ffs( i32 %arg ) ; <i32> [#uses=1]
17 %val1 = call i32 @ffs( i32 1 ) ; <i32> [#uses=1]
18 %val2 = call i32 @ffs( i32 2048 ) ; <i32> [#uses=1]
19 %val3 = call i32 @ffsl( i32 65536 ) ; <i32> [#uses=1]
20 %val4 = call i32 @ffsll( i64 1024 ) ; <i32> [#uses=1]
21 %val5 = call i32 @ffsll( i64 17179869184 ) ; <i32> [#uses=1]
22 %val6 = call i32 @ffsll( i64 1152921504606846976 ) ; <i32> [#uses=1]
23 %rslt1 = add i32 %val1, %val2 ; <i32> [#uses=1]
24 %rslt2 = add i32 %val3, %val4 ; <i32> [#uses=1]
25 %rslt3 = add i32 %val5, %val6 ; <i32> [#uses=1]
26 %rslt4 = add i32 %rslt1, %rslt2 ; <i32> [#uses=1]
27 %rslt5 = add i32 %rslt4, %rslt3 ; <i32> [#uses=2]
28 %rslt6 = add i32 %rslt5, %val0 ; <i32> [#uses=0]
34 define i32 @a(i64) nounwind {
35 %2 = call i32 @ffsll(i64 %0) ; <i32> [#uses=1]
40 define i32 @b() nounwind {
41 %ffs = call i32 @ffsll(i64 0)
44 ; CHECK-NEXT: ret i32 0