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[InstCombine] Add tests for indirect mul by power of 2; NFC
Differential Revision: https://reviews.llvm.org/D146346
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -passes=instcombine -S < %s | FileCheck %s | ||
declare void @use_i8(i8) | ||
define i8 @mul_selectp2_x(i8 %x, i1 %c) { | ||
; CHECK-LABEL: @mul_selectp2_x( | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 4 | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%s = select i1 %c, i8 2, i8 4 | ||
%r = mul i8 %s, %x | ||
ret i8 %r | ||
} | ||
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define i8 @mul_selectp2_x_propegate_nuw(i8 %x, i1 %c) { | ||
; CHECK-LABEL: @mul_selectp2_x_propegate_nuw( | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 4 | ||
; CHECK-NEXT: [[R:%.*]] = mul nuw nsw i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%s = select i1 %c, i8 2, i8 4 | ||
%r = mul nuw nsw i8 %s, %x | ||
ret i8 %r | ||
} | ||
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define i8 @mul_selectp2_x_multiuse_fixme(i8 %x, i1 %c) { | ||
; CHECK-LABEL: @mul_selectp2_x_multiuse_fixme( | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 4 | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: call void @use_i8(i8 [[S]]) | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%s = select i1 %c, i8 2, i8 4 | ||
%r = mul i8 %s, %x | ||
call void @use_i8(i8 %s) | ||
ret i8 %r | ||
} | ||
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define i8 @mul_selectp2_x_non_const(i8 %x, i1 %c, i8 %yy) { | ||
; CHECK-LABEL: @mul_selectp2_x_non_const( | ||
; CHECK-NEXT: [[Y:%.*]] = shl nuw i8 1, [[YY:%.*]] | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 [[Y]] | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%y = shl i8 1, %yy | ||
%s = select i1 %c, i8 2, i8 %y | ||
%r = mul i8 %s, %x | ||
ret i8 %r | ||
} | ||
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define i8 @mul_selectp2_x_non_const_multiuse(i8 %x, i1 %c, i8 %yy) { | ||
; CHECK-LABEL: @mul_selectp2_x_non_const_multiuse( | ||
; CHECK-NEXT: [[Y:%.*]] = shl nuw i8 1, [[YY:%.*]] | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 [[Y]] | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: call void @use_i8(i8 [[Y]]) | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%y = shl i8 1, %yy | ||
%s = select i1 %c, i8 2, i8 %y | ||
%r = mul i8 %s, %x | ||
call void @use_i8(i8 %y) | ||
ret i8 %r | ||
} | ||
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define i8 @mul_x_selectp2(i8 %xx, i1 %c) { | ||
; CHECK-LABEL: @mul_x_selectp2( | ||
; CHECK-NEXT: [[X:%.*]] = mul i8 [[XX:%.*]], [[XX]] | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 8, i8 1 | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[X]], [[S]] | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%x = mul i8 %xx, %xx | ||
%s = select i1 %c, i8 8, i8 1 | ||
%r = mul i8 %x, %s | ||
ret i8 %r | ||
} | ||
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define i8 @mul_select_nonp2_x_fail(i8 %x, i1 %c) { | ||
; CHECK-LABEL: @mul_select_nonp2_x_fail( | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], i8 2, i8 5 | ||
; CHECK-NEXT: [[R:%.*]] = mul i8 [[S]], [[X:%.*]] | ||
; CHECK-NEXT: ret i8 [[R]] | ||
; | ||
%s = select i1 %c, i8 2, i8 5 | ||
%r = mul i8 %s, %x | ||
ret i8 %r | ||
} | ||
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define <2 x i8> @mul_x_selectp2_vec(<2 x i8> %xx, i1 %c) { | ||
; CHECK-LABEL: @mul_x_selectp2_vec( | ||
; CHECK-NEXT: [[X:%.*]] = mul <2 x i8> [[XX:%.*]], [[XX]] | ||
; CHECK-NEXT: [[S:%.*]] = select i1 [[C:%.*]], <2 x i8> <i8 8, i8 16>, <2 x i8> <i8 4, i8 1> | ||
; CHECK-NEXT: [[R:%.*]] = mul <2 x i8> [[X]], [[S]] | ||
; CHECK-NEXT: ret <2 x i8> [[R]] | ||
; | ||
%x = mul <2 x i8> %xx, %xx | ||
%s = select i1 %c, <2 x i8> <i8 8, i8 16>, <2 x i8> <i8 4, i8 1> | ||
%r = mul <2 x i8> %x, %s | ||
ret <2 x i8> %r | ||
} |