mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-19 20:34:38 +00:00
bd44867477
make PIC calls a little more efficient: 1. Remove instructions setting up $gp if it is known that a function has been called at least once. 2. Save the address of a called function in a register instead of loading it from the GOT at every call site. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195892 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.2 KiB
LLVM
84 lines
2.2 KiB
LLVM
; RUN: llc -march=mipsel -disable-mips-delay-filler < %s | \
|
|
; RUN: FileCheck %s -check-prefix=O32
|
|
; RUN: llc -march=mipsel -mips-load-target-from-got=false \
|
|
; RUN: -disable-mips-delay-filler < %s | FileCheck %s -check-prefix=O32-LOADTGT
|
|
|
|
@gd1 = common global double 0.000000e+00, align 8
|
|
@gd2 = common global double 0.000000e+00, align 8
|
|
|
|
; O32-LABEL: caller3:
|
|
; O32-DAG: lw $25, %call16(callee3)
|
|
; O32-DAG: move $gp
|
|
; O32: jalr $25
|
|
; O32-DAG: lw $25, %call16(callee3)
|
|
; O32-NOT: move $gp
|
|
; O32: jalr $25
|
|
; O32-DAG: lw $25, %call16(callee3)
|
|
; O32-NOT: move $gp
|
|
; O32: jalr $25
|
|
|
|
; O32-LOADTGT-LABEL: caller3:
|
|
; O32-LOADTGT-DAG: lw $25, %call16(callee3)
|
|
; O32-LOADTGT-DAG: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
; O32-LOADTGT-DAG: move $25
|
|
; O32-LOADTGT-NOT: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
; O32-LOADTGT-DAG: move $25
|
|
; O32-LOADTGT-NOT: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
|
|
define void @caller3(i32 %n) {
|
|
entry:
|
|
tail call void @callee3()
|
|
tail call void @callee3()
|
|
%tobool1 = icmp eq i32 %n, 0
|
|
br i1 %tobool1, label %while.end, label %while.body
|
|
|
|
while.body:
|
|
%n.addr.02 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
|
|
%dec = add nsw i32 %n.addr.02, -1
|
|
tail call void @callee3()
|
|
%tobool = icmp eq i32 %dec, 0
|
|
br i1 %tobool, label %while.end, label %while.body
|
|
|
|
while.end:
|
|
ret void
|
|
}
|
|
|
|
declare void @callee3()
|
|
|
|
; O32-LABEL: caller4:
|
|
; O32-DAG: lw $25, %call16(ceil)
|
|
; O32-DAG: move $gp
|
|
; O32: jalr $25
|
|
; O32-DAG: lw $25, %call16(ceil)
|
|
; O32-NOT: move $gp
|
|
; O32: jalr $25
|
|
; O32-DAG: lw $25, %call16(ceil)
|
|
; O32-NOT: move $gp
|
|
; O32: jalr $25
|
|
|
|
; O32-LOADTGT-LABEL: caller4:
|
|
; O32-LOADTGT-DAG: lw $25, %call16(ceil)
|
|
; O32-LOADTGT-DAG: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
; O32-LOADTGT-DAG: move $25
|
|
; O32-LOADTGT-NOT: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
; O32-LOADTGT-DAG: move $25
|
|
; O32-LOADTGT-NOT: move $gp
|
|
; O32-LOADTGT: jalr $25
|
|
|
|
define void @caller4(double %d) {
|
|
entry:
|
|
%call = tail call double @ceil(double %d)
|
|
%call1 = tail call double @ceil(double %call)
|
|
store double %call1, double* @gd2, align 8
|
|
%call2 = tail call double @ceil(double %call1)
|
|
store double %call2, double* @gd1, align 8
|
|
ret void
|
|
}
|
|
|
|
declare double @ceil(double)
|