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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -O3 -S < %s | FileCheck %s --check-prefixes=ANY,OLDPM
; RUN: opt -passes='default<O3>' -S < %s | FileCheck %s --check-prefixes=ANY,NEWPM
; This should become a single funnel shift through a combination
; of aggressive-instcombine, simplifycfg, and instcombine.
; https://bugs.llvm.org/show_bug.cgi?id=34924
; These are equivalent, but the value name with the new-pm shows a bug -
; this code should not have been converted to a speculative select with
; an intermediate transform.
define i32 @rotl(i32 %a, i32 %b) {
; OLDPM-LABEL: @rotl(
; OLDPM-NEXT: entry:
; OLDPM-NEXT: [[TMP0:%.*]] = tail call i32 @llvm.fshl.i32(i32 [[A:%.*]], i32 [[A]], i32 [[B:%.*]])
; OLDPM-NEXT: ret i32 [[TMP0]]
;
; NEWPM-LABEL: @rotl(
; NEWPM-NEXT: entry:
; NEWPM-NEXT: [[SPEC_SELECT:%.*]] = tail call i32 @llvm.fshl.i32(i32 [[A:%.*]], i32 [[A]], i32 [[B:%.*]])
; NEWPM-NEXT: ret i32 [[SPEC_SELECT]]
;
entry:
%cmp = icmp eq i32 %b, 0
br i1 %cmp, label %end, label %rotbb
rotbb:
%sub = sub i32 32, %b
%shr = lshr i32 %a, %sub
%shl = shl i32 %a, %b
%or = or i32 %shr, %shl
br label %end
end:
%cond = phi i32 [ %or, %rotbb ], [ %a, %entry ]
ret i32 %cond
}
|