47 lines
1.6 KiB
LLVM
47 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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;
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; Test that the ffs library call simplifier works correctly even for
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; targets with 16-bit int.
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;
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; RUN: opt < %s -mtriple=avr-linux -passes=instcombine -S | FileCheck %s --check-prefix=AVR
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; RUN: opt < %s -mtriple=msp430-linux -passes=instcombine -S | FileCheck %s --check-prefix=MSP430
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; REQUIRES: avr-registered-target,msp430-registered-target
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declare i16 @ffs(i16)
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declare void @sink(i16)
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define void @fold_ffs(i16 %x) {
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; AVR-LABEL: @fold_ffs(
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; AVR-NEXT: call addrspace(1) void @sink(i16 0)
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; AVR-NEXT: call addrspace(1) void @sink(i16 1)
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; AVR-NEXT: [[CTTZ:%.*]] = call addrspace(1) i16 @llvm.cttz.i16(i16 [[X:%.*]], i1 true), !range [[RNG0:![0-9]+]]
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; AVR-NEXT: [[TMP1:%.*]] = add nuw nsw i16 [[CTTZ]], 1
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; AVR-NEXT: [[DOTNOT:%.*]] = icmp eq i16 [[X]], 0
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; AVR-NEXT: [[NX:%.*]] = select i1 [[DOTNOT]], i16 0, i16 [[TMP1]]
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; AVR-NEXT: call addrspace(1) void @sink(i16 [[NX]])
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; AVR-NEXT: ret void
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;
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; MSP430-LABEL: @fold_ffs(
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; MSP430-NEXT: call void @sink(i16 0)
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; MSP430-NEXT: call void @sink(i16 1)
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; MSP430-NEXT: [[CTTZ:%.*]] = call i16 @llvm.cttz.i16(i16 [[X:%.*]], i1 true), !range [[RNG0:![0-9]+]]
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; MSP430-NEXT: [[TMP1:%.*]] = add nuw nsw i16 [[CTTZ]], 1
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; MSP430-NEXT: [[DOTNOT:%.*]] = icmp eq i16 [[X]], 0
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; MSP430-NEXT: [[NX:%.*]] = select i1 [[DOTNOT]], i16 0, i16 [[TMP1]]
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; MSP430-NEXT: call void @sink(i16 [[NX]])
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; MSP430-NEXT: ret void
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;
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%n0 = call i16 @ffs(i16 0)
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call void @sink(i16 %n0)
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%n1 = call i16 @ffs(i16 1)
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call void @sink(i16 %n1)
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%nx = call i16 @ffs(i16 %x)
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call void @sink(i16 %nx)
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ret void
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}
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