mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-03 15:29:28 +00:00
a104d1eab2
MachineLICM and other things which run before LiveVariables is run. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85360 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.6 KiB
LLVM
59 lines
1.6 KiB
LLVM
; RUN: llc < %s -march=x86-64 -asm-verbose=false | FileCheck %s
|
|
|
|
; Currently, floating-point selects are lowered to CFG triangles.
|
|
; This means that one side of the select is always unconditionally
|
|
; evaluated, however with MachineSink we can sink the other side so
|
|
; that it's conditionally evaluated.
|
|
|
|
; CHECK: foo:
|
|
; CHECK: divsd
|
|
; CHECK-NEXT: testb $1, %dil
|
|
; CHECK-NEXT: jne
|
|
; CHECK-NEXT: divsd
|
|
|
|
define double @foo(double %x, double %y, i1 %c) nounwind {
|
|
%a = fdiv double %x, 3.2
|
|
%b = fdiv double %y, 3.3
|
|
%z = select i1 %c, double %a, double %b
|
|
ret double %z
|
|
}
|
|
|
|
; Hoist floating-point constant-pool loads out of loops.
|
|
|
|
; CHECK: bar:
|
|
; CHECK: movsd
|
|
; CHECK: align
|
|
define void @bar(double* nocapture %p, i64 %n) nounwind {
|
|
entry:
|
|
%0 = icmp sgt i64 %n, 0
|
|
br i1 %0, label %bb, label %return
|
|
|
|
bb:
|
|
%i.03 = phi i64 [ 0, %entry ], [ %3, %bb ]
|
|
%scevgep = getelementptr double* %p, i64 %i.03
|
|
%1 = load double* %scevgep, align 8
|
|
%2 = fdiv double 3.200000e+00, %1
|
|
store double %2, double* %scevgep, align 8
|
|
%3 = add nsw i64 %i.03, 1
|
|
%exitcond = icmp eq i64 %3, %n
|
|
br i1 %exitcond, label %return, label %bb
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
; Sink instructions with dead EFLAGS defs.
|
|
|
|
; CHECK: je
|
|
; CHECK-NEXT: orb
|
|
|
|
define zeroext i8 @zzz(i8 zeroext %a, i8 zeroext %b) nounwind readnone {
|
|
entry:
|
|
%tmp = zext i8 %a to i32 ; <i32> [#uses=1]
|
|
%tmp2 = icmp eq i8 %a, 0 ; <i1> [#uses=1]
|
|
%tmp3 = or i8 %b, -128 ; <i8> [#uses=1]
|
|
%tmp4 = and i8 %b, 127 ; <i8> [#uses=1]
|
|
%b_addr.0 = select i1 %tmp2, i8 %tmp4, i8 %tmp3 ; <i8> [#uses=1]
|
|
ret i8 %b_addr.0
|
|
}
|