211 lines
5.8 KiB
LLVM
211 lines
5.8 KiB
LLVM
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; 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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declare i8 @llvm.umin.i8(i8, i8)
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declare i8 @llvm.umax.i8(i8, i8)
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declare i8 @llvm.smin.i8(i8, i8)
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declare i8 @llvm.smax.i8(i8, i8)
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declare <3 x i8> @llvm.umin.v3i8(<3 x i8>, <3 x i8>)
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declare void @use(i8)
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define i8 @umin_known_bits(i8 %x, i8 %y) {
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; CHECK-LABEL: @umin_known_bits(
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; CHECK-NEXT: ret i8 0
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;
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%x2 = and i8 %x, 127
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%m = call i8 @llvm.umin.i8(i8 %x2, i8 %y)
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%r = and i8 %m, -128
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ret i8 %r
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}
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define i8 @umax_known_bits(i8 %x, i8 %y) {
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; CHECK-LABEL: @umax_known_bits(
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; CHECK-NEXT: ret i8 -128
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;
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%x2 = or i8 %x, -128
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%m = call i8 @llvm.umax.i8(i8 %x2, i8 %y)
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%r = and i8 %m, -128
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ret i8 %r
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}
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define i8 @smin_known_bits(i8 %x, i8 %y) {
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; CHECK-LABEL: @smin_known_bits(
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; CHECK-NEXT: ret i8 -128
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;
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%x2 = or i8 %x, -128
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%m = call i8 @llvm.smin.i8(i8 %x2, i8 %y)
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%r = and i8 %m, -128
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ret i8 %r
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}
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define i8 @smax_known_bits(i8 %x, i8 %y) {
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; CHECK-LABEL: @smax_known_bits(
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; CHECK-NEXT: ret i8 0
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;
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%x2 = and i8 %x, 127
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%m = call i8 @llvm.smax.i8(i8 %x2, i8 %y)
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%r = and i8 %m, -128
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ret i8 %r
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}
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define i8 @smax_sext(i5 %x, i5 %y) {
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; CHECK-LABEL: @smax_sext(
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; CHECK-NEXT: [[TMP1:%.*]] = call i5 @llvm.smax.i5(i5 [[X:%.*]], i5 [[Y:%.*]])
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; CHECK-NEXT: [[M:%.*]] = sext i5 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[M]]
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;
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%sx = sext i5 %x to i8
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%sy = sext i5 %y to i8
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%m = call i8 @llvm.smax.i8(i8 %sx, i8 %sy)
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ret i8 %m
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}
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; Extra use is ok.
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define i8 @smin_sext(i5 %x, i5 %y) {
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; CHECK-LABEL: @smin_sext(
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; CHECK-NEXT: [[SY:%.*]] = sext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: call void @use(i8 [[SY]])
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; CHECK-NEXT: [[TMP1:%.*]] = call i5 @llvm.smin.i5(i5 [[X:%.*]], i5 [[Y]])
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; CHECK-NEXT: [[M:%.*]] = sext i5 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[M]]
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;
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%sx = sext i5 %x to i8
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%sy = sext i5 %y to i8
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call void @use(i8 %sy)
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%m = call i8 @llvm.smin.i8(i8 %sx, i8 %sy)
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ret i8 %m
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}
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; Sext doesn't change unsigned min/max comparison of narrow values.
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define i8 @umax_sext(i5 %x, i5 %y) {
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; CHECK-LABEL: @umax_sext(
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; CHECK-NEXT: [[SX:%.*]] = sext i5 [[X:%.*]] to i8
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; CHECK-NEXT: call void @use(i8 [[SX]])
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; CHECK-NEXT: [[TMP1:%.*]] = call i5 @llvm.umax.i5(i5 [[X]], i5 [[Y:%.*]])
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; CHECK-NEXT: [[M:%.*]] = sext i5 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[M]]
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;
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%sx = sext i5 %x to i8
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call void @use(i8 %sx)
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%sy = sext i5 %y to i8
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%m = call i8 @llvm.umax.i8(i8 %sx, i8 %sy)
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ret i8 %m
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}
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define <3 x i8> @umin_sext(<3 x i5> %x, <3 x i5> %y) {
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; CHECK-LABEL: @umin_sext(
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; CHECK-NEXT: [[TMP1:%.*]] = call <3 x i5> @llvm.umin.v3i5(<3 x i5> [[X:%.*]], <3 x i5> [[Y:%.*]])
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; CHECK-NEXT: [[M:%.*]] = sext <3 x i5> [[TMP1]] to <3 x i8>
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; CHECK-NEXT: ret <3 x i8> [[M]]
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;
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%sx = sext <3 x i5> %x to <3 x i8>
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%sy = sext <3 x i5> %y to <3 x i8>
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%m = call <3 x i8> @llvm.umin.v3i8(<3 x i8> %sx, <3 x i8> %sy)
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ret <3 x i8> %m
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}
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; Negative test - zext may change sign of inputs
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define i8 @smax_zext(i5 %x, i5 %y) {
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; CHECK-LABEL: @smax_zext(
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; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
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; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[ZX]], i8 [[ZY]])
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i5 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.smax.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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; Negative test - zext may change sign of inputs
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define i8 @smin_zext(i5 %x, i5 %y) {
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; CHECK-LABEL: @smin_zext(
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; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
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; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.smin.i8(i8 [[ZX]], i8 [[ZY]])
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i5 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.smin.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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define i8 @umax_zext(i5 %x, i5 %y) {
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; CHECK-LABEL: @umax_zext(
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; CHECK-NEXT: [[TMP1:%.*]] = call i5 @llvm.umax.i5(i5 [[X:%.*]], i5 [[Y:%.*]])
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; CHECK-NEXT: [[M:%.*]] = zext i5 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i5 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.umax.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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define i8 @umin_zext(i5 %x, i5 %y) {
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; CHECK-LABEL: @umin_zext(
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; CHECK-NEXT: [[TMP1:%.*]] = call i5 @llvm.umin.i5(i5 [[X:%.*]], i5 [[Y:%.*]])
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; CHECK-NEXT: [[M:%.*]] = zext i5 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i5 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.umin.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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; Negative test - mismatched types
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define i8 @umin_zext_types(i6 %x, i5 %y) {
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; CHECK-LABEL: @umin_zext_types(
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; CHECK-NEXT: [[ZX:%.*]] = zext i6 [[X:%.*]] to i8
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; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[ZX]], i8 [[ZY]])
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i6 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.umin.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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; Negative test - mismatched extends
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define i8 @umin_ext(i5 %x, i5 %y) {
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; CHECK-LABEL: @umin_ext(
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; CHECK-NEXT: [[SX:%.*]] = sext i5 [[X:%.*]] to i8
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; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[SX]], i8 [[ZY]])
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; CHECK-NEXT: ret i8 [[M]]
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;
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%sx = sext i5 %x to i8
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%zy = zext i5 %y to i8
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%m = call i8 @llvm.umin.i8(i8 %sx, i8 %zy)
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ret i8 %m
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}
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; Negative test - too many uses.
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define i8 @umin_zext_uses(i5 %x, i5 %y) {
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; CHECK-LABEL: @umin_zext_uses(
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; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
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; CHECK-NEXT: call void @use(i8 [[ZX]])
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; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
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; CHECK-NEXT: call void @use(i8 [[ZY]])
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; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[ZX]], i8 [[ZY]])
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; CHECK-NEXT: ret i8 [[M]]
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;
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%zx = zext i5 %x to i8
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call void @use(i8 %zx)
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%zy = zext i5 %y to i8
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call void @use(i8 %zy)
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%m = call i8 @llvm.umin.i8(i8 %zx, i8 %zy)
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ret i8 %m
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}
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