зеркало из https://github.com/microsoft/clang.git
45 строки
993 B
C
45 строки
993 B
C
/* Check that the result of a bitfield assignment is properly
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truncated and does not generate a redundant load. */
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/* Check that we get one load for each simple assign and two for the
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compound assign (load the old value before the add then load again
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to store back). Also check that our g0 pattern is good. */
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// RUN: clang-cc -triple i386-unknown-unknown -O0 -emit-llvm -o %t %s
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// RUN: grep 'load ' %t | count 5
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// RUN: grep "@g0" %t | count 4
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// Check that we got the right value.
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// RUN: clang-cc -triple i386-unknown-unknown -O3 -emit-llvm -o %t %s
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// RUN: grep 'load ' %t | count 0
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// RUN: grep "@g0" %t | count 0
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struct s0 {
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int f0 : 2;
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_Bool f1 : 1;
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unsigned f2 : 2;
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};
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int g0();
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void f0(void) {
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struct s0 s;
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if ((s.f0 = 3) != -1) g0();
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}
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void f1(void) {
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struct s0 s;
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if ((s.f1 = 3) != 1) g0();
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}
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void f2(void) {
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struct s0 s;
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if ((s.f2 = 3) != 3) g0();
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}
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void f3(void) {
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struct s0 s;
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// Just check this one for load counts.
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s.f0 += 3;
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}
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