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...type %X = call i32 bitcast (i8 ()* @test4a to i32 ()*)() Undefined behavior: Call argument count mismatches callee argument count %X = call i32 bitcast (i32 (i32)* @test6a to i32 ()*)() Undefined behavior: Call argument count mismatches callee argument count call void bitcast (void ()* @test7a to void (i32)*)(i32 5) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130530/bf6747e1/attachment.html>

Hello, This is an interesting example. Whenever I see strange things like this, I use opt's -lint. In this case, opt -lint reports: Undefined behavior: Call return type mismatches callee return type %call = call float @alias_f32(float %tmp2) #1 You'll get a similar report when the parameter types mismatch. Pete On Wed, May 29, 2013 at 5:40 PM, Arsenault, Matthew <

Hi, I'm not sure what the expected behavior of calling a bitcasted function is. Suppose you have a case like this (which you get on the source level from attribute alias): @alias_f32 = alias bitcast (i32 (i32)* @func_i32 to float (float)*) define internal i32 @func_i32(i32 %v) noinline nounwind { entry: ret i32 %v } define void @bitcast_alias_scalar(float* noalias %source, float* noalias

...tr +; DARWIN-X64: .cfi_endproc + %retval = alloca i32, align 4 + %a = alloca i32, align 4 + %j = alloca i32*, align 8 + store i32 0, i32* %retval + %0 = load i32* %a, align 4 + %add = add nsw i32 %0, 1 + store i32 %add, i32* %a, align 4 + store i32* %a, i32** %j, align 8 + ret void +} + +; test7a: PtrToInt Cast +; no safestack attribute +; Requires no protector. +define void @test7a() nounwind uwtable readnone { +entry: +; LINUX-I386: test7a: +; LINUX-I386-NOT: movl __llvm__unsafe_stack_ptr +; LINUX-I386: .cfi_endproc + +; LINUX-X64: test7a: +; LINUX-X64-NOT: movq %fs:640 +; LINUX...