Fix and re-enable codegen tests

They should be run with LLVM 5

.travis.yml

@@ -9,4 +9,6 @@ services:
 script:
   - ./build-docker-image.sh
   - ./build-debug.sh
-  - build-debug/tests/bpftrace_test --gtest_filter=-codegen*
+  - ./build-release.sh
+  - build-debug/tests/bpftrace_test
+  - build-release/tests/bpftrace_test

tests/README.md

@@ -2,6 +2,6 @@
 
 Tests can be run with the `bpftrace_test` executable.
 
-The code generation tests are based on the output of the latest stable version of LLVM, so may give errors if run with an older LLVM. They can be excluded by running:
+The code generation tests are based on the output of LLVM 5, so may give errors if run with different version. They can be excluded by running:
 
 `bpftrace_test --gtest_filter=-codegen*`

tests/codegen.cpp

@@ -113,7 +113,7 @@ entry:
   store i8 104, i8* %str.repack3, align 1
   %str.repack4 = getelementptr inbounds [64 x i8], [64 x i8]* %str, i64 0, i64 4
   %2 = bitcast i64* %"@x_key" to i8*
-  call void @llvm.memset.p0i8.i64(i8* nonnull %str.repack4, i8 0, i64 60, i32 1, i1 false)
+  call void @llvm.memset.p0i8.i64(i8* %str.repack4, i8 0, i64 60, i32 1, i1 false)
   call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %2)
   store i64 0, i64* %"@x_key", align 8
   %pseudo = tail call i64 @llvm.bpf.pseudo(i64 1, i64 1)
@@ -191,11 +191,11 @@ entry:
   store i8 97, i8* %1, align 1
   %str.sroa.3.0..sroa_idx = getelementptr inbounds [128 x i8], [128 x i8]* %"@x_key", i64 0, i64 1
   %str1.sroa.0.0..sroa_idx = getelementptr inbounds [128 x i8], [128 x i8]* %"@x_key", i64 0, i64 64
-  call void @llvm.memset.p0i8.i64(i8* nonnull %str.sroa.3.0..sroa_idx, i8 0, i64 63, i32 1, i1 false)
+  call void @llvm.memset.p0i8.i64(i8* %str.sroa.3.0..sroa_idx, i8 0, i64 63, i32 1, i1 false)
   store i8 98, i8* %str1.sroa.0.0..sroa_idx, align 1
   %str1.sroa.3.0..sroa_idx = getelementptr inbounds [128 x i8], [128 x i8]* %"@x_key", i64 0, i64 65
   %2 = bitcast i64* %"@x_val" to i8*
-  call void @llvm.memset.p0i8.i64(i8* nonnull %str1.sroa.3.0..sroa_idx, i8 0, i64 63, i32 1, i1 false)
+  call void @llvm.memset.p0i8.i64(i8* %str1.sroa.3.0..sroa_idx, i8 0, i64 63, i32 1, i1 false)
   call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %2)
   store i64 44, i64* %"@x_val", align 8
   %pseudo = tail call i64 @llvm.bpf.pseudo(i64 1, i64 1)
@@ -1008,7 +1008,7 @@ entry:
   store i8 102, i8* %str.repack7, align 1
   %str.repack8 = getelementptr inbounds [64 x i8], [64 x i8]* %str, i64 0, i64 4
   %2 = bitcast i64* %"@x_key" to i8*
-  call void @llvm.memset.p0i8.i64(i8* nonnull %str.repack8, i8 0, i64 60, i32 1, i1 false)
+  call void @llvm.memset.p0i8.i64(i8* %str.repack8, i8 0, i64 60, i32 1, i1 false)
   call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %2)
   store i64 0, i64* %"@x_key", align 8
   %pseudo = tail call i64 @llvm.bpf.pseudo(i64 1, i64 1)