2014-04-04 07:47:24 +08:00
|
|
|
; RUN: llc -mtriple=thumb-eabi -mcpu=arm1156t2-s -mattr=+thumb2 %s -o - | FileCheck %s
|
2009-07-08 04:39:03 +08:00
|
|
|
|
|
|
|
define i32 @t1(i32 %a, i32 %b, i32 %c) nounwind {
|
2009-11-17 08:20:26 +08:00
|
|
|
; CHECK: t1
|
2010-11-18 04:13:28 +08:00
|
|
|
; CHECK: mvn r0, #-2147483648
|
2009-11-17 08:20:26 +08:00
|
|
|
; CHECK: cmp r2, #10
|
2012-08-17 07:21:55 +08:00
|
|
|
; CHECK: it le
|
Use predication instead of pseudo-opcodes when folding into MOVCC.
Now that it is possible to dynamically tie MachineInstr operands,
predicated instructions are possible in SSA form:
%vreg3<def> = SUBri %vreg1, -2147483647, pred:14, pred:%noreg, %opt:%noreg
%vreg4<def,tied1> = MOVCCr %vreg3<tied0>, %vreg1, %pred:12, pred:%CPSR
Becomes a predicated SUBri with a tied imp-use:
SUBri %vreg1, -2147483647, pred:13, pred:%CPSR, opt:%noreg, %vreg1<imp-use,tied0>
This means that any instruction that is safe to move can be folded into
a MOVCC, and the *CC pseudo-instructions are no longer needed.
The test case changes reflect that Thumb2SizeReduce recognizes the
predicated instructions. It didn't understand the pseudos.
llvm-svn: 163274
2012-09-06 07:58:02 +08:00
|
|
|
; CHECK: addle r1, r0
|
2012-08-17 07:21:55 +08:00
|
|
|
; CHECK: mov r0, r1
|
2009-07-08 04:39:03 +08:00
|
|
|
%tmp1 = icmp sgt i32 %c, 10
|
|
|
|
%tmp2 = select i1 %tmp1, i32 0, i32 2147483647
|
|
|
|
%tmp3 = add i32 %tmp2, %b
|
|
|
|
ret i32 %tmp3
|
|
|
|
}
|
|
|
|
|
|
|
|
define i32 @t2(i32 %a, i32 %b, i32 %c) nounwind {
|
2009-11-17 08:20:26 +08:00
|
|
|
; CHECK: t2
|
|
|
|
; CHECK: cmp r2, #10
|
2012-08-17 07:21:55 +08:00
|
|
|
; CHECK: it le
|
|
|
|
; CHECK: addle.w r1, r1, #-2147483648
|
|
|
|
; CHECK: mov r0, r1
|
2009-11-17 08:20:26 +08:00
|
|
|
|
2009-07-08 04:39:03 +08:00
|
|
|
%tmp1 = icmp sgt i32 %c, 10
|
|
|
|
%tmp2 = select i1 %tmp1, i32 0, i32 2147483648
|
|
|
|
%tmp3 = add i32 %tmp2, %b
|
|
|
|
ret i32 %tmp3
|
|
|
|
}
|
|
|
|
|
|
|
|
define i32 @t3(i32 %a, i32 %b, i32 %c, i32 %d) nounwind {
|
2009-11-17 08:20:26 +08:00
|
|
|
; CHECK: t3
|
|
|
|
; CHECK: cmp r2, #10
|
2012-08-17 07:21:55 +08:00
|
|
|
; CHECK: it le
|
Use predication instead of pseudo-opcodes when folding into MOVCC.
Now that it is possible to dynamically tie MachineInstr operands,
predicated instructions are possible in SSA form:
%vreg3<def> = SUBri %vreg1, -2147483647, pred:14, pred:%noreg, %opt:%noreg
%vreg4<def,tied1> = MOVCCr %vreg3<tied0>, %vreg1, %pred:12, pred:%CPSR
Becomes a predicated SUBri with a tied imp-use:
SUBri %vreg1, -2147483647, pred:13, pred:%CPSR, opt:%noreg, %vreg1<imp-use,tied0>
This means that any instruction that is safe to move can be folded into
a MOVCC, and the *CC pseudo-instructions are no longer needed.
The test case changes reflect that Thumb2SizeReduce recognizes the
predicated instructions. It didn't understand the pseudos.
llvm-svn: 163274
2012-09-06 07:58:02 +08:00
|
|
|
; CHECK: suble r1, #10
|
2012-08-17 07:21:55 +08:00
|
|
|
; CHECK: mov r0, r1
|
2009-07-08 04:39:03 +08:00
|
|
|
%tmp1 = icmp sgt i32 %c, 10
|
|
|
|
%tmp2 = select i1 %tmp1, i32 0, i32 10
|
|
|
|
%tmp3 = sub i32 %b, %tmp2
|
|
|
|
ret i32 %tmp3
|
|
|
|
}
|