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llvm-mirror/test/CodeGen/PowerPC/fast-isel-cmp-imm.ll
Zi Xuan Wu 287883a58b [PowerPC] Enhance the fast selection of cmp instruction and clean up related asserts 
Fast selection of llvm icmp and fcmp instructions is not handled well about VSX instruction support.

We'd use VSX float comparison instruction instead of non-vsx float comparison instruction 
if the operand register class is VSSRC or VSFRC because i32 and i64 are mapped to VSSRC and 
VSFRC correspondingly if VSX feature is opened.

If the target does not have corresponding VSX instruction comparison for some type, 
just copy VSX-related register to common float register class and use non-vsx comparison instruction.

Differential Revision: https://reviews.llvm.org/D57078

llvm-svn: 352174
2019-01-25 07:24:59 +00:00

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; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort=1 -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -mattr=-vsx | FileCheck %s --check-prefix=ELF64
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort=1 -mtriple=powerpc64le-unknown-linux-gnu -mattr=+vsx | FileCheck %s --check-prefix=VSX
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort=1 -mtriple=powerpc-unknown-linux-gnu -mcpu=e500 -mattr=spe | FileCheck %s --check-prefix=SPE
declare void @foo()
define void @t1a(float %a) nounwind {
entry:
; ELF64-LABEL: @t1a
; SPE-LABEL: @t1a
; VSX-LABEL: @t1a
%cmp = fcmp oeq float %a, 0.000000e+00
; ELF64: addis
; ELF64: lfs
; ELF64: fcmpu
; VSX: addis
; VSX: lfs
; VSX: fcmpu
; SPE: efscmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t1b(float %a) nounwind {
entry:
; ELF64-LABEL: @t1b
; SPE-LABEL: @t1b
; VSX-LABEL: @t1b
%cmp = fcmp oeq float %a, -0.000000e+00
; ELF64: addis
; ELF64: lfs
; ELF64: fcmpu
; VSX: addis
; VSX: lfs
; VSX: fcmpu
; SPE: efscmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t1c(float %a) nounwind {
entry:
; ELF64-LABEL: @t1c
; SPE-LABEL: @t1c
; VSX-LABEL: @t1c
%cmp = fcmp oeq float -0.000000e+00, %a
; ELF64: addis
; ELF64: lfs
; ELF64: fcmpu
; VSX: addis
; VSX: lfs
; VSX: fcmpu
; SPE: efscmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t2a(double %a) nounwind {
entry:
; ELF64-LABEL: @t2a
; SPE-LABEL: @t2a
; VSX-LABEL: @t2a
%cmp = fcmp oeq double %a, 0.000000e+00
; ELF64: addis
; ELF64: lfd
; ELF64: fcmpu
; VSX: addis
; VSX: lfd
; VSX: xscmpudp
; SPE: efdcmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t2b(double %a) nounwind {
entry:
; ELF64-LABEL: @t2b
; SPE-LABEL: @t2b
; VSX-LABEL: @t2b
%cmp = fcmp oeq double %a, -0.000000e+00
; ELF64: addis
; ELF64: lfd
; ELF64: fcmpu
; VSX: addis
; VSX: lfd
; VSX: xscmpudp
; SPE: efdcmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t2c(double %a) nounwind {
entry:
; ELF64-LABEL: @t2c
; SPE-LABEL: @t2c
; VSX-LABEL: @t2c
%cmp = fcmp oeq double -0.000000e+00, %a
; ELF64: addis
; ELF64: lfd
; ELF64: fcmpu
; VSX: addis
; VSX: lfd
; VSX: xscmpudp
; SPE: efdcmpeq
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t4(i8 signext %a) nounwind {
entry:
; ELF64-LABEL: @t4
%cmp = icmp eq i8 %a, -1
; ELF64: extsb
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t5(i8 zeroext %a) nounwind {
entry:
; ELF64-LABEL: @t5
%cmp = icmp eq i8 %a, 1
; ELF64: extsb
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t5a(i8 zeroext %a) nounwind {
entry:
; ELF64-LABEL: @t5a
%cmp = icmp eq i8 1, %a
; ELF64: extsb
; ELF64: cmpw
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t6(i16 signext %a) nounwind {
entry:
; ELF64-LABEL: @t6
%cmp = icmp eq i16 %a, -1
; ELF64: extsh
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t7(i16 zeroext %a) nounwind {
entry:
; ELF64-LABEL: @t7
%cmp = icmp eq i16 %a, 1
; ELF64: extsh
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t7a(i16 zeroext %a) nounwind {
entry:
; ELF64-LABEL: @t7a
%cmp = icmp eq i16 1, %a
; ELF64: extsh
; ELF64: cmpw
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t8(i32 %a) nounwind {
entry:
; ELF64-LABEL: @t8
%cmp = icmp eq i32 %a, -1
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t9(i32 %a) nounwind {
entry:
; ELF64-LABEL: @t9
%cmp = icmp eq i32 %a, 1
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t10(i32 %a) nounwind {
entry:
; ELF64-LABEL: @t10
%cmp = icmp eq i32 %a, 384
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t11(i32 %a) nounwind {
entry:
; ELF64-LABEL: @t11
%cmp = icmp eq i32 %a, 4096
; ELF64: cmpwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t11a(i32 %a) nounwind {
entry:
; ELF64-LABEL: @t11a
%cmp = icmp eq i32 4096, %a
; ELF64: cmpw
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t12(i8 %a) nounwind {
entry:
; ELF64-LABEL: @t12
%cmp = icmp ugt i8 %a, -113
; ELF64: clrlwi
; ELF64: cmplwi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t13() nounwind ssp {
entry:
; ELF64-LABEL: @t13
%cmp = icmp slt i32 -123, -2147483648
; ELF64: li
; ELF64: lis
; ELF64: cmpw
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
ret void
if.end: ; preds = %entry
ret void
}
define void @t14(i64 %a) nounwind {
entry:
; ELF64-LABEL: @t14
%cmp = icmp eq i64 %a, -1
; ELF64: cmpdi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t15(i64 %a) nounwind {
entry:
; ELF64-LABEL: @t15
%cmp = icmp eq i64 %a, 1
; ELF64: cmpdi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t16(i64 %a) nounwind {
entry:
; ELF64-LABEL: @t16
%cmp = icmp eq i64 %a, 384
; ELF64: cmpdi
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t17(i64 %a) nounwind {
entry:
; ELF64-LABEL: @t17
%cmp = icmp eq i64 %a, 32768
; Extra operand so we don't match on cmpdi.
; ELF64: cmpd {{[0-9]+}}
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
define void @t17a(i64 %a) nounwind {
entry:
; ELF64-LABEL: @t17a
%cmp = icmp eq i64 32768, %a
; Extra operand so we don't match on cmpdi.
; ELF64: cmpd {{[0-9]+}}
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
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