mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
5d6f185653
This does not matter on newer cores (where we can use reciprocal estimates in fast-math mode anyway), but for older cores this allows us to generate better fast-math code where we have multiple FDIVs with a common divisor. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222710 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; RUN: llc -mcpu=ppc64 < %s | FileCheck %s
|
|
target datalayout = "E-m:e-i64:64-n32:64"
|
|
target triple = "powerpc64-unknown-linux-gnu"
|
|
|
|
; Following test case checks:
|
|
; a / D; b / D; c / D;
|
|
; =>
|
|
; recip = 1.0 / D; a * recip; b * recip; c * recip;
|
|
|
|
define void @three_fdiv_double(double %D, double %a, double %b, double %c) #0 {
|
|
; CHECK-LABEL: three_fdiv_double:
|
|
; CHECK: fdiv
|
|
; CHECK-NEXT-NOT: fdiv
|
|
; CHECK: fmul
|
|
; CHECK: fmul
|
|
; CHECK: fmul
|
|
%div = fdiv double %a, %D
|
|
%div1 = fdiv double %b, %D
|
|
%div2 = fdiv double %c, %D
|
|
tail call void @foo_3d(double %div, double %div1, double %div2)
|
|
ret void
|
|
}
|
|
|
|
define void @two_fdiv_double(double %D, double %a, double %b) #0 {
|
|
; CHECK-LABEL: two_fdiv_double:
|
|
; CHECK: fdiv
|
|
; CHECK: fdiv
|
|
; CHECK-NEXT-NOT: fmul
|
|
%div = fdiv double %a, %D
|
|
%div1 = fdiv double %b, %D
|
|
tail call void @foo_2d(double %div, double %div1)
|
|
ret void
|
|
}
|
|
|
|
declare void @foo_3d(double, double, double)
|
|
declare void @foo_3_2xd(<2 x double>, <2 x double>, <2 x double>)
|
|
declare void @foo_2d(double, double)
|
|
|
|
attributes #0 = { "unsafe-fp-math"="true" }
|