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llvm-project/llvm/test/CodeGen/X86/fast-isel-float-half-conver...

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Change the fast-isel-abort option from bool to int to enable "levels" Summary: Currently fast-isel-abort will only abort for regular instructions, and just warn for function calls, terminators, function arguments. There is already fast-isel-abort-args but nothing for calls and terminators. This change turns the fast-isel-abort options into an integer option, so that multiple levels of strictness can be defined. This will help no being surprised when the "abort" option indeed does not abort, and enables the possibility to write test that verifies that no intrinsics are forgotten by fast-isel. Reviewers: resistor, echristo Subscribers: jfb, llvm-commits Differential Revision: http://reviews.llvm.org/D7941 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 230775
2015-02-28 02:32:11 +08:00
; RUN: llc -fast-isel -fast-isel-abort=1 -asm-verbose=false -mtriple=x86_64-unknown-unknown -mattr=+f16c < %s | FileCheck %s
[X86][FastIsel] Teach how to select float-half conversion intrinsics. This patch teaches X86FastISel how to select intrinsic 'convert_from_fp16' and intrinsic 'convert_to_fp16'. If the target has F16C, we can select VCVTPS2PHrr for a float-half conversion, and VCVTPH2PSrr for a half-float conversion. Differential Revision: http://reviews.llvm.org/D7673 llvm-svn: 230043
2015-02-21 03:37:14 +08:00
; Verify that fast-isel correctly expands float-half conversions.
define i16 @test_fp32_to_fp16(float %a) {
; CHECK-LABEL: test_fp32_to_fp16:
; CHECK: vcvtps2ph $0, %xmm0, %xmm0
; CHECK-NEXT: vmovd %xmm0, %eax
; CHECK-NEXT: retq
entry:
%0 = call i16 @llvm.convert.to.fp16.f32(float %a)
ret i16 %0
}
define float @test_fp16_to_fp32(i32 %a) {
; CHECK-LABEL: test_fp16_to_fp32:
; CHECK: movswl %di, %eax
; CHECK-NEXT: vmovd %eax, %xmm0
; CHECK-NEXT: vcvtph2ps %xmm0, %xmm0
; CHECK-NEXT: retq
entry:
%0 = trunc i32 %a to i16
%1 = call float @llvm.convert.from.fp16.f32(i16 %0)
ret float %1
}
declare i16 @llvm.convert.to.fp16.f32(float)
declare float @llvm.convert.from.fp16.f32(i16)