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098c6a547f
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163274 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
3.8 KiB
LLVM
141 lines
3.8 KiB
LLVM
; RUN: llc < %s -mtriple=arm-apple-darwin | FileCheck %s
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; RUN: llc < %s -march=arm -mattr=+vfp2 | FileCheck %s --check-prefix=CHECK-VFP
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; RUN: llc < %s -mattr=+neon,+thumb2 -mtriple=thumbv7-apple-darwin | FileCheck %s --check-prefix=CHECK-NEON
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define i32 @f1(i32 %a.s) {
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;CHECK: f1:
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;CHECK: moveq
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entry:
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%tmp = icmp eq i32 %a.s, 4
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define i32 @f2(i32 %a.s) {
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;CHECK: f2:
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;CHECK: movgt
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entry:
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%tmp = icmp sgt i32 %a.s, 4
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define i32 @f3(i32 %a.s, i32 %b.s) {
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;CHECK: f3:
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;CHECK: movlt
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entry:
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%tmp = icmp slt i32 %a.s, %b.s
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define i32 @f4(i32 %a.s, i32 %b.s) {
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;CHECK: f4:
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;CHECK: movle
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entry:
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%tmp = icmp sle i32 %a.s, %b.s
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define i32 @f5(i32 %a.u, i32 %b.u) {
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;CHECK: f5:
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;CHECK: movls
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entry:
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%tmp = icmp ule i32 %a.u, %b.u
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define i32 @f6(i32 %a.u, i32 %b.u) {
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;CHECK: f6:
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;CHECK: movhi
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entry:
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%tmp = icmp ugt i32 %a.u, %b.u
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%tmp1.s = select i1 %tmp, i32 2, i32 3
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ret i32 %tmp1.s
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}
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define double @f7(double %a, double %b) {
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;CHECK: f7:
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;CHECK: movlt
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;CHECK: movlt
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;CHECK-VFP: f7:
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;CHECK-VFP: vmovmi
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%tmp = fcmp olt double %a, 1.234e+00
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%tmp1 = select i1 %tmp, double -1.000e+00, double %b
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ret double %tmp1
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}
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; <rdar://problem/7260094>
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;
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; We used to generate really horrible code for this function. The main cause was
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; a lack of a custom lowering routine for an ISD::SELECT. This would result in
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; two "it" blocks in the code: one for the "icmp" and another to move the index
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; into the constant pool based on the value of the "icmp". If we have one "it"
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; block generated, odds are good that we have close to the ideal code for this:
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;
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; CHECK-NEON: _f8:
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; CHECK-NEON: movw [[R3:r[0-9]+]], #1123
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; CHECK-NEON: adr [[R2:r[0-9]+]], LCPI7_0
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; CHECK-NEON-NEXT: cmp r0, [[R3]]
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; CHECK-NEON-NEXT: it eq
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; CHECK-NEON-NEXT: addeq{{.*}} [[R2]], #4
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; CHECK-NEON-NEXT: ldr
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; CHECK-NEON: bx
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define arm_apcscc float @f8(i32 %a) nounwind {
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%tmp = icmp eq i32 %a, 1123
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%tmp1 = select i1 %tmp, float 0x3FF3BE76C0000000, float 0x40030E9A20000000
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ret float %tmp1
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}
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; <rdar://problem/9049552>
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; Glue values can only have a single use, but the following test exposed a
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; case where a SELECT was lowered with 2 uses of a comparison, causing the
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; scheduler to assert.
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; CHECK-VFP: f9:
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declare i8* @objc_msgSend(i8*, i8*, ...)
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define void @f9() optsize {
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entry:
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%cmp = icmp eq i8* undef, inttoptr (i32 4 to i8*)
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%conv191 = select i1 %cmp, float -3.000000e+00, float 0.000000e+00
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%conv195 = select i1 %cmp, double -1.000000e+00, double 0.000000e+00
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%add = fadd double %conv195, 1.100000e+01
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%conv196 = fptrunc double %add to float
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%add201 = fadd float undef, %conv191
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%tmp484 = bitcast float %conv196 to i32
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%tmp478 = bitcast float %add201 to i32
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%tmp490 = insertvalue [2 x i32] undef, i32 %tmp484, 0
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%tmp493 = insertvalue [2 x i32] %tmp490, i32 %tmp478, 1
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call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, [2 x i32], i32, float)*)(i8* undef, i8* undef, [2 x i32] %tmp493, i32 0, float 1.000000e+00) optsize
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ret void
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}
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; CHECK: f10
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define float @f10(i32 %a, i32 %b) nounwind uwtable readnone ssp {
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; CHECK-NOT: floatsisf
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%1 = icmp eq i32 %a, %b
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%2 = zext i1 %1 to i32
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%3 = sitofp i32 %2 to float
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ret float %3
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}
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; CHECK: f11
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define float @f11(i32 %a, i32 %b) nounwind uwtable readnone ssp {
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; CHECK-NOT: floatsisf
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%1 = icmp eq i32 %a, %b
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%2 = sitofp i1 %1 to float
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ret float %2
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}
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; CHECK: f12
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define float @f12(i32 %a, i32 %b) nounwind uwtable readnone ssp {
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; CHECK-NOT: floatunsisf
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%1 = icmp eq i32 %a, %b
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%2 = uitofp i1 %1 to float
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ret float %2
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}
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