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// Ensure that when rebuilding a module we don't save its old modtime when
// building modules that depend on it.
// RUN: rm -rf %t
// RUN: mkdir -p %t
// This could be replaced by diamond_*, except we want to modify the top header
// RUN: echo '@import l; @import r;' > %t/b.h
// RUN: echo '@import t; // fromt l' > %t/l.h
// RUN: echo '@import t; // fromt r' > %t/r.h
// RUN: echo '// top' > %t/t.h
// RUN: echo 'module b { header "b.h" } module l { header "l.h" }' > %t/module.map
// RUN: echo 'module r { header "r.h" } module t { header "t.h" }' >> %t/module.map
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -fdisable-module-hash \
// RUN: -I %t -fsyntax-only %s -Rmodule-build 2>&1 \
// RUN: | FileCheck -check-prefix=REBUILD-ALL %s
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -fdisable-module-hash \
// RUN: -I %t -fsyntax-only %s -Rmodule-build -verify
// Add an identifier to ensure everything depending on t is out of date
// RUN: echo 'extern int a;' >> %t/t.h
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -fdisable-module-hash \
// RUN: -I %t -fsyntax-only %s -Rmodule-build 2>&1 \
// RUN: | FileCheck -check-prefix=REBUILD-ALL %s
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -fdisable-module-hash \
// RUN: -I %t -fsyntax-only %s -Rmodule-build -verify
// REBUILD-ALL: building module 'b'
// REBUILD-ALL: building module 'l'
// REBUILD-ALL: building module 't'
// REBUILD-ALL: building module 'r'
// Use -verify when expecting no modules to be rebuilt.
// expected-no-diagnostics
@import b;
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