| ; RUN: opt < %s -msan -S | FileCheck %s |
| |
| target datalayout = "E-m:m-i8:8:32-i16:16:32-i64:64-n32:64-S128" |
| target triple = "mips64--linux" |
| |
| define i32 @foo(i32 %guard, ...) { |
| %vl = alloca i8*, align 8 |
| %1 = bitcast i8** %vl to i8* |
| call void @llvm.lifetime.start.p0i8(i64 32, i8* %1) |
| call void @llvm.va_start(i8* %1) |
| call void @llvm.va_end(i8* %1) |
| call void @llvm.lifetime.end.p0i8(i64 32, i8* %1) |
| ret i32 0 |
| } |
| |
| ; First, check allocation of the save area. |
| |
| ; CHECK-LABEL: @foo |
| ; CHECK: [[A:%.*]] = load {{.*}} @__msan_va_arg_overflow_size_tls |
| ; CHECK: [[B:%.*]] = add i64 0, [[A]] |
| ; CHECK: [[C:%.*]] = alloca {{.*}} [[B]] |
| |
| ; CHECK: [[STACK:%.*]] = bitcast {{.*}} @__msan_va_arg_tls to i8* |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[C]], i8* align 8 [[STACK]], i64 [[B]], i1 false) |
| |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 |
| declare void @llvm.va_start(i8*) #2 |
| declare void @llvm.va_end(i8*) #2 |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 |
| |
| define i32 @bar() { |
| %1 = call i32 (i32, ...) @foo(i32 0, i32 1, i64 2, double 3.000000e+00) |
| ret i32 %1 |
| } |
| |
| ; Save the incoming shadow value from the arguments in the __msan_va_arg_tls |
| ; array. The first argument is stored at position 4, since it's right |
| ; justified. |
| ; CHECK-LABEL: @bar |
| ; CHECK: store i32 0, i32* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 4) to i32*), align 8 |
| ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 8) to i64*), align 8 |
| ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 16) to i64*), align 8 |
| ; CHECK: store {{.*}} 24, {{.*}} @__msan_va_arg_overflow_size_tls |
| |
| ; Check multiple fixed arguments. |
| declare i32 @foo2(i32 %g1, i32 %g2, ...) |
| define i32 @bar2() { |
| %1 = call i32 (i32, i32, ...) @foo2(i32 0, i32 1, i64 2, double 3.000000e+00) |
| ret i32 %1 |
| } |
| |
| ; CHECK-LABEL: @bar2 |
| ; CHECK: store i64 0, i64* getelementptr inbounds ([100 x i64], [100 x i64]* @__msan_va_arg_tls, i32 0, i32 0), align 8 |
| ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 8) to i64*), align 8 |
| ; CHECK: store {{.*}} 16, {{.*}} @__msan_va_arg_overflow_size_tls |