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llvm-project/llvm/test/CodeGen/PowerPC/fast-isel-rsp.ll

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[PowerPC] [PowerPC] Enhance the fast selection of fptoi & fptrunc instruction and clean up related asserts Summary: Fast selection of llvm fptoi & fptrunc instructions is not handled well about VSX instruction support. We'd use VSX float convert integer instruction instead of non-vsx float convert integer instruction if the operand register class is VSSRC or VSFRC because i32 and i64 are mapped to VSSRC and VSFRC correspondingly if VSX feature is openeded. For float trunc instruction, we do this silimar work like float convert integer instruction to try to use VSX instruction. Reviewed By: jsji Differential Revision: https://reviews.llvm.org/D58430 llvm-svn: 354762
2019-02-25 10:46:16 +08:00
; RUN: llc -mcpu=generic -mtriple=powerpc64le-unknown-unknown -O0 < %s \
; RUN: -verify-machineinstrs | FileCheck %s --check-prefix=GENERIC
; RUN: llc -mcpu=ppc -mtriple=powerpc64le-unknown-unknown -O0 < %s \
; RUN: -verify-machineinstrs | FileCheck %s
define float @testRSP(double %x) {
entry:
%0 = fptrunc double %x to float
ret float %0
; CHECK: frsp 1, 1
; GENERIC: xsrsp 1, 1
}