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