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getMangledTypeStr: clarify how it mangles types, and add tests

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"Write a set of tests that show how name mangling is done for overloaded intrinsics."  These happen to use gc.relocates to exercise the codepath in question, but is not a GC specific test.

Patch by: artagnon@gmail.com
Differential Revision: http://reviews.llvm.org/D6915



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226056 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Philip Reames 2015-01-14 23:05:17 +00:00
parent 2495c84184
commit 8f9d11309a
2 changed files with 51 additions and 0 deletions
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4
lib/IR/Function.cpp
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@ -455,6 +455,10 @@ unsigned Function::lookupIntrinsicID() const {
/// which can't be confused with it's prefix. This ensures we don't have
/// collisions between two unrelated function types. Otherwise, you might
/// parse ffXX as f(fXX) or f(fX)X. (X is a placeholder for any other type.)
/// Manglings of integers, floats, and vectors ('i', 'f', and 'v' prefix in most
/// cases) fall back to the MVT codepath, where they could be mangled to
/// 'x86mmx', for example; matching on derived types is not sufficient to mangle
/// everything.
static std::string getMangledTypeStr(Type* Ty) {
std::string Result;
if (PointerType* PTyp = dyn_cast<PointerType>(Ty)) {

47
test/CodeGen/Generic/overloaded-intrinsic-name.ll Normal file
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@ -0,0 +1,47 @@
; RUN: opt -verify -S < %s
; Tests the name mangling performed by the codepath following
; getMangledTypeStr(). Only tests that code with the various manglings
; run fine: doesn't actually test the mangling with the type of the
; arguments. Meant to serve as an example-document on how the user
; should do name manglings.
; Exercise the most general case, llvm_anyptr_type, using gc.relocate
; and gc.statepoint. Note that it has nothing to do with gc.*
; functions specifically: any function that accepts llvm_anyptr_type
; will serve the purpose.
; function and integer
define i32* @test_iAny(i32* %v) {
%tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32* %v)
%v-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 4, i32 4)
ret i32* %v-new
}
; float
define float* @test_fAny(float* %v) {
%tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, float* %v)
%v-new = call float* @llvm.experimental.gc.relocate.p0f32(i32 %tok, i32 4, i32 4)
ret float* %v-new
}
; array of integers
define [3 x i32]* @test_aAny([3 x i32]* %v) {
%tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, [3 x i32]* %v)
%v-new = call [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32 %tok, i32 4, i32 4)
ret [3 x i32]* %v-new
}
; vector of integers
define <3 x i32>* @test_vAny(<3 x i32>* %v) {
%tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, <3 x i32>* %v)
%v-new = call <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32 %tok, i32 4, i32 4)
ret <3 x i32>* %v-new
}
declare zeroext i1 @return_i1()
declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()*, i32, i32, ...)
declare i32* @llvm.experimental.gc.relocate.p0i32(i32, i32, i32)
declare float* @llvm.experimental.gc.relocate.p0f32(i32, i32, i32)
declare [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32, i32, i32)
declare <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32, i32, i32)