135 lines
6.2 KiB
LLVM
135 lines
6.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; These patterns are all just traditional clamp pattern.
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; But they are not canonical, the and/or/xor is more canonically represented
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; as an add+icmp.
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define i32 @t0_select_cond_and_v0(i32 %X) {
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; CHECK-LABEL: @t0_select_cond_and_v0(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%dont_need_to_clamp_positive = icmp sle i32 %X, 32767
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%dont_need_to_clamp_negative = icmp sge i32 %X, -32768
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%clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 32767
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%dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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define i32 @t1_select_cond_and_v1(i32 %X) {
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; CHECK-LABEL: @t1_select_cond_and_v1(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%dont_need_to_clamp_positive = icmp sle i32 %X, 32767
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%dont_need_to_clamp_negative = icmp sge i32 %X, -32768
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%clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -32768
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%dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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;-------------------------------------------------------------------------------
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define i32 @t2_select_cond_or_v0(i32 %X) {
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; CHECK-LABEL: @t2_select_cond_or_v0(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%need_to_clamp_positive = icmp sgt i32 %X, 32767
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%need_to_clamp_negative = icmp slt i32 %X, -32768
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%clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -32768
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%need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative
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%R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X
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ret i32 %R
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}
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define i32 @t3_select_cond_or_v1(i32 %X) {
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; CHECK-LABEL: @t3_select_cond_or_v1(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%need_to_clamp_positive = icmp sgt i32 %X, 32767
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%need_to_clamp_negative = icmp slt i32 %X, -32768
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%clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767
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%need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative
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%R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X
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ret i32 %R
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}
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;-------------------------------------------------------------------------------
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define i32 @t4_select_cond_xor_v0(i32 %X) {
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; CHECK-LABEL: @t4_select_cond_xor_v0(
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; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%need_to_clamp_positive = icmp sgt i32 %X, 32767
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%dont_need_to_clamp_negative = icmp sgt i32 %X, -32768
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%clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -32768
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%dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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define i32 @t4_select_cond_xor_v1(i32 %X) {
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; CHECK-LABEL: @t4_select_cond_xor_v1(
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; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%need_to_clamp_positive = icmp sgt i32 %X, 32767
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%dont_need_to_clamp_negative = icmp sgt i32 %X, -32768
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%clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -32768
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%dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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define i32 @t5_select_cond_xor_v2(i32 %X) {
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; CHECK-LABEL: @t5_select_cond_xor_v2(
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; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%dont_need_to_clamp_positive = icmp sle i32 %X, 32767
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%need_to_clamp_negative = icmp sle i32 %X, -32768
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%clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767
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%dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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define i32 @t5_select_cond_xor_v3(i32 %X) {
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; CHECK-LABEL: @t5_select_cond_xor_v3(
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; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
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; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
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; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
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; CHECK-NEXT: ret i32 [[R]]
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;
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%dont_need_to_clamp_positive = icmp sle i32 %X, 32767
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%need_to_clamp_negative = icmp sle i32 %X, -32768
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%clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 32767
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%dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative
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%R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
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ret i32 %R
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}
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