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Remove immarg from llvm.expect

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The LangRef claimed this was required to be a constant, but this
appears to be wrong.

Fixes bug 41079.

llvm-svn: 356353
This commit is contained in:
Matt Arsenault 2019-03-17 23:16:18 +00:00
parent 186c1f47d8
commit f54cc0780c
4 changed files with 5 additions and 15 deletions
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3
docs/LangRef.rst
View File

@ -15819,8 +15819,7 @@ Arguments:
""""""""""
The ``llvm.expect`` intrinsic takes two arguments. The first argument is
a value. The second argument is an expected value, this needs to be a
constant value, variables are not allowed.
a value. The second argument is an expected value.
Semantics:
""""""""""

4
include/llvm/IR/Intrinsics.td
View File

@ -689,13 +689,13 @@ let IntrProperties = [IntrInaccessibleMemOnly] in {
llvm_metadata_ty ]>;
}
// FIXME: Add intrinsics for fcmp, fptrunc, fpext, fptoui and fptosi.
// FIXME: Add intrinsics for fabs and copysign?
// FIXME: Add intrinsics for fabs and copysign?
//===------------------------- Expect Intrinsics --------------------------===//
//
def int_expect : Intrinsic<[llvm_anyint_ty],
[LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem, ImmArg<1>]>;
[LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
//===-------------------- Bit Manipulation Intrinsics ---------------------===//
//

4
test/Transforms/LowerExpectIntrinsic/PR33346.ll
View File

@ -7,12 +7,12 @@ bb:
store i64 %arg, i64* %tmp, align 8
%tmp1 = load i64, i64* %tmp, align 8
%tmp2 = load i64, i64* %tmp, align 8
%tmp3 = call i64 @llvm.expect.i64(i64 %tmp1, i64 123)
%tmp3 = call i64 @llvm.expect.i64(i64 %tmp1, i64 %tmp2)
ret i64 %tmp3
}
; Function Attrs: nounwind readnone
declare i64 @llvm.expect.i64(i64, i64 immarg)
declare i64 @llvm.expect.i64(i64, i64)
!llvm.module.flags = !{!0}

9
test/Verifier/intrinsic-immarg.ll
View File

@ -65,15 +65,6 @@ define void @objectsize(i8* %ptr, i1 %a, i1 %b, i1 %c) {
ret void
}
declare i8 @llvm.expect.i8(i8, i8)
define i8 @expect(i8 %arg0, i8 %arg1) {
; CHECK: immarg operand has non-immediate parameter
; CHECK-NEXT: i8 %arg1
; CHECK-NEXT: %ret = call i8 @llvm.expect.i8(i8 %arg0, i8 %arg1)
%ret = call i8 @llvm.expect.i8(i8 %arg0, i8 %arg1)
ret i8 %ret
}
declare i64 @llvm.smul.fix.i64(i64, i64, i32)
define i64 @smul_fix(i64 %arg0, i64 %arg1, i32 %arg2) {
; CHECK: immarg operand has non-immediate parameter