1ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao/* Check that the result of a bitfield assignment is properly 2ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao truncated and does not generate a redundant load. */ 3ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 4ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao/* Check that we get one load for each simple assign and two for the 5ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao compound assign (load the old value before the add then load again 6ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao to store back). Also check that our g0 pattern is good. */ 7ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: %clang_cc1 -triple i386-unknown-unknown -O0 -emit-llvm -o %t %s 8ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: grep 'load ' %t | count 5 9ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: grep "@g0" %t | count 4 10ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 11ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// Check that we got the right value. 12ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: %clang_cc1 -triple i386-unknown-unknown -O3 -emit-llvm -o %t %s 13ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: grep 'load ' %t | count 0 14ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// RUN: grep "@g0" %t | count 0 15ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 16ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaostruct s0 { 17ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao int f0 : 2; 18ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao _Bool f1 : 1; 19ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao unsigned f2 : 2; 20ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao}; 21ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 22ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaoint g0(); 23ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 24ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaovoid f0(void) { 25ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao struct s0 s; 26ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao if ((s.f0 = 3) != -1) g0(); 27ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao} 28ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 29ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaovoid f1(void) { 30ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao struct s0 s; 31ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao if ((s.f1 = 3) != 1) g0(); 32ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao} 33ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 34ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaovoid f2(void) { 35ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao struct s0 s; 36ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao if ((s.f2 = 3) != 3) g0(); 37ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao} 38ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 39ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaovoid f3(void) { 40ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao struct s0 s; 41ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao // Just check this one for load counts. 42ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao s.f0 += 3; 43ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao} 44ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 45