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[InstCombine] Test abs with dominating condition (NFC)

This commit is contained in:
Nikita Popov 2020-09-05 10:56:19 +02:00
parent 714ceefad9
commit d401e376e4
1 changed files with 46 additions and 0 deletions
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46
llvm/test/Transforms/InstCombine/abs-intrinsic.ll
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@ -126,3 +126,49 @@ define <4 x i32> @abs_of_select_neg_false_val(<4 x i1> %b, <4 x i32> %x) {
%abs = call <4 x i32> @llvm.abs.v4i32(<4 x i32> %sel, i1 false) %abs = call <4 x i32> @llvm.abs.v4i32(<4 x i32> %sel, i1 false)
ret <4 x i32> %abs ret <4 x i32> %abs
} }
define i32 @abs_dom_cond_nopoison(i32 %x) {
; CHECK-LABEL: @abs_dom_cond_nopoison(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], -1
; CHECK-NEXT: br i1 [[CMP]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[A1:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 false)
; CHECK-NEXT: ret i32 [[A1]]
; CHECK: false:
; CHECK-NEXT: [[A2:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 false)
; CHECK-NEXT: ret i32 [[A2]]
;
%cmp = icmp sge i32 %x, 0
br i1 %cmp, label %true, label %false
true:
%a1 = call i32 @llvm.abs.i32(i32 %x, i1 false)
ret i32 %a1
false:
%a2 = call i32 @llvm.abs.i32(i32 %x, i1 false)
ret i32 %a2
}
define i32 @abs_dom_cond_poison(i32 %x) {
; CHECK-LABEL: @abs_dom_cond_poison(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], -1
; CHECK-NEXT: br i1 [[CMP]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK: true:
; CHECK-NEXT: [[A1:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 true)
; CHECK-NEXT: ret i32 [[A1]]
; CHECK: false:
; CHECK-NEXT: [[A2:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 true)
; CHECK-NEXT: ret i32 [[A2]]
;
%cmp = icmp sge i32 %x, 0
br i1 %cmp, label %true, label %false
true:
%a1 = call i32 @llvm.abs.i32(i32 %x, i1 true)
ret i32 %a1
false:
%a2 = call i32 @llvm.abs.i32(i32 %x, i1 true)
ret i32 %a2
}