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[TargetLowering][DAGCombine][MSP430] Shift Amount Threshold in DAGCombine (4) (Baseline tests) 

Summary: Baseline tests before applying D70042

Reviewers: spatel, asl

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70083
This commit is contained in:
joanlluch 2019-11-11 16:15:33 +01:00
parent 29f5d1670c
commit abbbf9880c
1 changed files with 70 additions and 0 deletions
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70
llvm/test/CodeGen/MSP430/shift-amount-threshold.ll
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@ -147,3 +147,73 @@ entry:
%cond = select i1 %cmp, i16 32, i16 0 %cond = select i1 %cmp, i16 32, i16 0
ret i16 %cond ret i16 %cond
} }
; Check the following conversion in TargetLowering::SimplifySetCC
; (X & 8) != 0 --> (X & 8) >> 3
define i16 @testSimplifySetCC_0_sh8(i16 %x) {
; CHECK-LABEL: testSimplifySetCC_0_sh8:
; CHECK: ; %bb.0: ; %entry
; CHECK-NEXT: bit #256, r12
; CHECK-NEXT: mov r2, r12
; CHECK-NEXT: and #1, r12
; CHECK-NEXT: ret
entry:
%and = and i16 %x, 256
%cmp = icmp ne i16 %and, 0
%conv = zext i1 %cmp to i16
ret i16 %conv
}
; Check the following conversion in TargetLowering::SimplifySetCC
; (X & 8) == 8 --> (X & 8) >> 3
define i16 @testSimplifySetCC_1_sh8(i16 %x) {
; CHECK-LABEL: testSimplifySetCC_1_sh8:
; CHECK: ; %bb.0: ; %entry
; CHECK-NEXT: bit #256, r12
; CHECK-NEXT: mov r2, r12
; CHECK-NEXT: and #1, r12
; CHECK-NEXT: ret
entry:
%and = and i16 %x, 256
%cmp = icmp eq i16 %and, 256
%conv = zext i1 %cmp to i16
ret i16 %conv
}
; Check the following conversion in DAGCombiner::foldSelectCCToShiftAnd
; select_cc setlt X, 0, A, 0 -> "and (srl X, C2), A" iff A is a single-bit
define i16 @testShiftAnd_1_sh8(i16 %x) {
; CHECK-LABEL: testShiftAnd_1_sh8:
; CHECK: ; %bb.0: ; %entry
; CHECK-NEXT: mov r12, r13
; CHECK-NEXT: mov #128, r12
; CHECK-NEXT: tst r13
; CHECK-NEXT: jl .LBB10_2
; CHECK-NEXT: ; %bb.1: ; %entry
; CHECK-NEXT: clr r12
; CHECK-NEXT: .LBB10_2: ; %entry
; CHECK-NEXT: ret
entry:
%cmp = icmp slt i16 %x, 0
%cond = select i1 %cmp, i16 128, i16 0
ret i16 %cond
}
; Check the following conversion in DAGCombiner::foldSelectCCToShiftAnd
; select_cc setlt X, 0, A, 0 -> "and (srl X, C2), A" iff A is a single-bit
define i16 @testShiftAnd_1_sh9(i16 %x) {
; CHECK-LABEL: testShiftAnd_1_sh9:
; CHECK: ; %bb.0: ; %entry
; CHECK-NEXT: mov r12, r13
; CHECK-NEXT: mov #64, r12
; CHECK-NEXT: tst r13
; CHECK-NEXT: jl .LBB11_2
; CHECK-NEXT: ; %bb.1: ; %entry
; CHECK-NEXT: clr r12
; CHECK-NEXT: .LBB11_2: ; %entry
; CHECK-NEXT: ret
entry:
%cmp = icmp slt i16 %x, 0
%cond = select i1 %cmp, i16 64, i16 0
ret i16 %cond
}