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llvm-project/clang/test/Driver/pic.c

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Teach Clang about PIE compilations. This is the first step of PR12380. First, this patch cleans up the parsing of the PIC and PIE family of options in the driver. The existing logic failed to claim arguments all over the place resulting in kludges that marked the options as unused. Instead actually walk all of the arguments and claim them properly. We now treat -f{,no-}{pic,PIC,pie,PIE} as a single set, accepting the last one on the commandline. Previously there were lots of ordering bugs that could creep in due to the nature of the parsing. Let me know if folks would like weird things such as "-fPIE -fno-pic" to turn on PIE, but disable full PIC. This doesn't make any sense to me, but we could in theory support it. Options that seem to have intentional "trump" status (-static, -mkernel, etc) continue to do so and are commented as such. Next, a -pie-level flag is threaded into the frontend, rigged to a language option, and handled preprocessor, setting up the appropriate defines. We'll now have the correct defines when compiling with -fpie. The one place outside of the preprocessor that was inspecting the PIC level (as opposed to the relocation model, which is set and handled separately, yay!) is in the GNU ObjC runtime. I changed it to exactly preserve existing behavior. If folks want to change its behavior in the face of PIE, they can do that in a separate patch. Essentially the only functionality changed here is the preprocessor defines and bug-fixes to the argument management. Tests have been updated and extended to test all of this a bit more thoroughly. llvm-svn: 154291
2012-04-09 00:40:35 +08:00
// Test the driver's control over the PIC behavior. These consist of tests of
// the relocation model flags and the pic level flags passed to CC1.
//
// CHECK-NO-PIC: "-mrelocation-model" "static"
// CHECK-NO-PIC-NOT: "-pic-level"
// CHECK-NO-PIC-NOT: "-pie-level"
//
// CHECK-DYNAMIC-NO-PIC1: "-mrelocation-model" "dynamic-no-pic"
// CHECK-DYNAMIC-NO-PIC1: "-pic-level" "1"
//
// CHECK-DYNAMIC-NO-PIC2: "-mrelocation-model" "dynamic-no-pic"
// CHECK-DYNAMIC-NO-PIC2: "-pic-level" "2"
//
// CHECK-PIC1-NOT: "-mrelocation-model"
// CHECK-PIC1: "-pic-level" "1"
//
// CHECK-PIC2-NOT: "-mrelocation-model"
// CHECK-PIC2: "-pic-level" "2"
//
// CHECK-PIE1-NOT: "-mrelocation-model"
// CHECK-PIE1: "-pie-level" "1"
//
// CHECK-PIE2-NOT: "-mrelocation-model"
// CHECK-PIE2: "-pie-level" "2"
//
// RUN: %clang -c %s -target i386-unknown-unknown -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC1
// RUN: %clang -c %s -target i386-unknown-unknown -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC2
// RUN: %clang -c %s -target i386-unknown-unknown -fpie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIE1
// RUN: %clang -c %s -target i386-unknown-unknown -fPIE -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -fno-pic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fPIC -fno-PIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -fno-PIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fPIC -fno-pic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpie -fno-pie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fPIE -fno-PIE -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpie -fno-PIE -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fPIE -fno-pie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpie -fno-pic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -fno-pie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC2
// RUN: %clang -c %s -target i386-unknown-unknown -fPIC -fpic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC1
// RUN: %clang -c %s -target i386-unknown-unknown -fpic -fPIE -fpie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIE1
// RUN: %clang -c %s -target i386-unknown-unknown -fpie -fPIC -fPIE -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
//
// Defaults change for Darwin.
// RUN: %clang -c %s -target i386-apple-darwin -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC2
// RUN: %clang -c %s -target i386-apple-darwin -fno-pic -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-apple-darwin -fno-PIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
//
// Disregard any of the PIC-specific flags if we have a trump-card flag.
// RUN: %clang -c %s -target i386-unknown-unknown -mkernel -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -static -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NO-PIC
// RUN: %clang -c %s -target i386-unknown-unknown -mdynamic-no-pic -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-DYNAMIC-NO-PIC1
// RUN: %clang -c %s -target i386-apple-darwin -mdynamic-no-pic -fPIC -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-DYNAMIC-NO-PIC2