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84c021a3a6
Support reassociation for min/max. With that we should be able to transform min(min(a, b), c) -> min(min(a, c), b) if min(a, c) is already available. Reviewed By: mkazantsev, lebedev.ri Differential Revision: https://reviews.llvm.org/D88287
172 lines
6.7 KiB
LLVM
172 lines
6.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -nary-reassociate -S | FileCheck %s
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; RUN: opt < %s -passes='nary-reassociate' -S | FileCheck %s
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declare i32 @llvm.smax.i32(i32 %a, i32 %b)
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; m1 = smax(a,b) ; has side uses
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; m2 = smax(smax((b,c), a) -> m2 = smax(m1, c)
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define i32 @smax_test1(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test1(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[SMAX3_NARY:%.*]] = call i32 @llvm.smax.i32(i32 [[SMAX1]], i32 [[C:%.*]])
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3_NARY]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp sgt i32 %b, %c
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%smax2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp sgt i32 %smax2, %a
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%smax3 = select i1 %c3, i32 %smax2, i32 %a
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; m1 = smax(a,b) ; has side uses
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; m2 = smax(b, (smax(a, c))) -> m2 = smax(m1, c)
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define i32 @smax_test2(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test2(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[SMAX3_NARY:%.*]] = call i32 @llvm.smax.i32(i32 [[SMAX1]], i32 [[C:%.*]])
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3_NARY]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp sgt i32 %a, %c
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%smax2 = select i1 %c2, i32 %a, i32 %c
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%c3 = icmp sgt i32 %b, %smax2
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%smax3 = select i1 %c3, i32 %b, i32 %smax2
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; Same test as smax_test1 but uses @llvm.smax intrinsic
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define i32 @smax_test3(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test3(
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; CHECK-NEXT: [[SMAX1:%.*]] = call i32 @llvm.smax.i32(i32 [[A:%.*]], i32 [[B:%.*]])
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; CHECK-NEXT: [[SMAX3_NARY:%.*]] = call i32 @llvm.smax.i32(i32 [[SMAX1]], i32 [[C:%.*]])
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3_NARY]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%smax1 = call i32 @llvm.smax.i32(i32 %a, i32 %b)
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%smax2 = call i32 @llvm.smax.i32(i32 %b, i32 %c)
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%smax3 = call i32 @llvm.smax.i32(i32 %smax2, i32 %a)
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; m1 = smax(a,b) ; has side uses
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; m2 = smax(smax_or_eq((b,c), a) -> m2 = smax(m1, c)
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define i32 @umax_test4(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @umax_test4(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[SMAX3_NARY:%.*]] = call i32 @llvm.smax.i32(i32 [[SMAX1]], i32 [[C:%.*]])
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3_NARY]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp sge i32 %b, %c
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%smax_or_eq2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp sgt i32 %smax_or_eq2, %a
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%smax3 = select i1 %c3, i32 %smax_or_eq2, i32 %a
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; m1 = smax_or_eq(a,b) ; has side uses
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; m2 = smax_or_eq(smax((b,c), a) -> m2 = smax(m1, c)
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define i32 @smax_test5(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test5(
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX_OR_EQ1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[SMAX_OR_EQ3_NARY:%.*]] = call i32 @llvm.smax.i32(i32 [[SMAX_OR_EQ1]], i32 [[C:%.*]])
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX_OR_EQ1]], [[SMAX_OR_EQ3_NARY]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sge i32 %a, %b
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%smax_or_eq1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp sgt i32 %b, %c
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%smax2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp sge i32 %smax2, %a
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%smax_or_eq3 = select i1 %c3, i32 %smax2, i32 %a
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%res = add i32 %smax_or_eq1, %smax_or_eq3
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ret i32 %res
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}
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; m1 = smax(a,b) ; has side uses
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; m2 = smax(umax((b,c), a) ; check that signed and unsigned maxs are not mixed
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define i32 @smax_test6(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test6(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[C2:%.*]] = icmp ugt i32 [[B]], [[C:%.*]]
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; CHECK-NEXT: [[UMAX2:%.*]] = select i1 [[C2]], i32 [[B]], i32 [[C]]
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; CHECK-NEXT: [[C3:%.*]] = icmp sgt i32 [[UMAX2]], [[A]]
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; CHECK-NEXT: [[SMAX3:%.*]] = select i1 [[C3]], i32 [[UMAX2]], i32 [[A]]
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp ugt i32 %b, %c
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%umax2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp sgt i32 %umax2, %a
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%smax3 = select i1 %c3, i32 %umax2, i32 %a
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; m1 = smax(a,b) ; has side uses
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; m2 = smax(smin((b,c), a) ; check that max and min are not mixed
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define i32 @smax_test7(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test7(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[C2:%.*]] = icmp slt i32 [[B]], [[C:%.*]]
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; CHECK-NEXT: [[SMIN2:%.*]] = select i1 [[C2]], i32 [[B]], i32 [[C]]
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; CHECK-NEXT: [[C3:%.*]] = icmp slt i32 [[SMIN2]], [[A]]
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; CHECK-NEXT: [[SMAX3:%.*]] = select i1 [[C3]], i32 [[SMIN2]], i32 [[A]]
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp slt i32 %b, %c
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%smin2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp slt i32 %smin2, %a
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%smax3 = select i1 %c3, i32 %smin2, i32 %a
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%res = add i32 %smax1, %smax3
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ret i32 %res
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}
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; Pointer types are not supported yet
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define i32* @smax_test8(i32* %a, i32* %b, i32* %c) {
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; CHECK-LABEL: @smax_test8(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32* [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32* [[A]], i32* [[B]]
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; CHECK-NEXT: [[C2:%.*]] = icmp sgt i32* [[B]], [[C:%.*]]
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; CHECK-NEXT: [[SMAX2:%.*]] = select i1 [[C2]], i32* [[B]], i32* [[C]]
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; CHECK-NEXT: [[C3:%.*]] = icmp sgt i32* [[SMAX2]], [[A]]
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; CHECK-NEXT: [[SMAX3:%.*]] = select i1 [[C3]], i32* [[SMAX2]], i32* [[A]]
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; CHECK-NEXT: [[C4:%.*]] = icmp sgt i32* [[SMAX1]], [[SMAX3]]
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[C4]], i32* [[SMAX1]], i32* [[SMAX3]]
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; CHECK-NEXT: ret i32* [[RES]]
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;
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%c1 = icmp sgt i32* %a, %b
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%smax1 = select i1 %c1, i32* %a, i32* %b
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%c2 = icmp sgt i32* %b, %c
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%smax2 = select i1 %c2, i32* %b, i32* %c
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%c3 = icmp sgt i32* %smax2, %a
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%smax3 = select i1 %c3, i32* %smax2, i32* %a
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%c4 = icmp sgt i32* %smax1, %smax3
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%res = select i1 %c4, i32* %smax1, i32* %smax3
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ret i32* %res
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}
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